The Who, What, Why, & How of Digital Marketing

With how accessible the internet is today, would you believe me if I told you the number of people who go online every day is still increasing?

It is. In fact, “constant” internet usage among adults increased by 5% in just the last three years, according to Pew Research. And although we say it a lot, the way people shop and buy really has changed along with it — meaning offline marketing isn’t as effective as it used to be.

Marketing has always been about connecting with your audience in the right place and at the right time. Today, that means you need to meet them where they are already spending time: on the internet.

Enter — in other words, any form of marketing that exists online.

At HubSpot, we talk a lot about inbound marketing as a really effective way to attract, engage, and delight customers online. But we still get a lot of questions from people all around the world about digital marketing. So, we decided to answer them. Click the links below to jump to each question, or keep reading to see how digital marketing is carries out today.

So, how do you define digital marketing today?

What is digital marketing?

Digital marketing encompasses all marketing efforts that use an electronic device or the internet. Businesses leverage digital channels such as search engines, social media, email, and other websites to connect with current and prospective customers.

A seasoned inbound marketer might say inbound marketing and digital marketing are virtually the same thing, but there are some minor differences. And conversations with marketers and business owners in the U.S., U.K., Asia, Australia, and New Zealand, I’ve learned a lot about how those small differences are being observed across the world.

Why is digital marketing important?

Digital marketing helps you reach a larger audience than you could through traditional methods, and target the prospects who are most likely to buy your product or service. Additionally, it’s often more cost-effective than traditional advertising, and enables you to measure success on a daily basis and pivot as you see fit.

There are a few major benefits to digital marketing. Let’s dive into four of them, now.

1. You can target only the prospects most likely to purchase your product or service.

If you place an advertisement on TV, in a magazine, or on a billboard, you have limited control over who sees the ad. Of course, you can measure certain demographics — including the magazine’s typical readership, or the demographic of a certain neighborhood — but it’s still largely a shot in the dark.

Digital marketing, on the other hand, allows you to identify and target a highly-specific audience, and send that audience personalized, high-converting marketing messages.

For instance, you might take advantage of social media’s targeting features to show social media ads to a certain audience based on variables such as age, gender, location, interests, networks, or behaviors. Alternatively, you might use PPC or SEO strategies to serve ads to users who’ve shown interest in your product or service, or who’ve searched specific keywords that relate to your industry.

Ultimately, digital marketing enables you to conduct the research necessary to identify your buyer persona, and lets you refine your marketing strategy over time to ensure you’re reaching prospects most likely to buy. Best of all, digital marketing helps you market to sub-groups within your larger target audience. If you sell multiple products or services to different buyer personas, this is especially helpful.

2. It’s more cost-effective than traditional marketing methods.

Digital marketing enables you to track campaigns on a daily basis and decrease the amount of money you’re spending on a certain channel if it isn’t demonstrating high ROI. The same can’t be said for traditional forms of advertising. It doesn’t matter how your billboard performs — it still costs the same, whether or not it converts for you.

Plus, with digital marketing, you have complete control over where you choose to spend your money. Perhaps rather than paying for PPC campaigns, you choose to spend money on design software to create high-converting Instagram content. A digital marketing strategy allows you to continuously pivot, ensuring you’re never wasting money on channels that don’t perform well.

By and large, digital marketing is a more cost-effective solution, and provides you unique opportunities to ensure you’re getting the most bang for your buck.

For instance, if you work for a small business with a limited budget, you might try investing in social media, blogging, or SEO – three strategies that can give you high ROI even with minimal spend.

3. Digital marketing lets you outrank bigger players in your industry.

If you work for a small business, it’s likely difficult for you to compete with the major brands in your industry, many of which have millions of dollars to invest in television commercials or nationwide campaigns. Fortunately, there are plenty of opportunities to outrank the big players through strategic digital marketing initiatives.

For instance, you might identify certain long-tail keywords that relate to your product or service, and create high-quality content to help you rank on search engines for those keywords. Search engines don’t care which brand is biggest — instead, search engines will prioritize content that resonates best with the target audience.

Additionally, social media enables you to reach new audiences through influencer marketing. I don’t personally follow any big brands on social media, but I do follow influencers who will occasionally showcase products or services they like — if you work for a small-to-medium sized company, this could be a good avenue to consider.

4. Digital marketing is measurable.

Digital marketing can give you a comprehensive, start-to-finish view of all the metrics that might matter to your company — including impressions, shares, views, clicks, and time on page. This is one of the biggest benefits of digital marketing. While traditional advertising can be useful for certain goals, its biggest limitation is measurability.

Unlike most offline marketing efforts, digital marketing allows marketers to see accurate results in real time. If you’ve ever put an advertisement in a newspaper, you’ll know how difficult it is to estimate how many people actually flipped to that page and paid attention to your ad. There’s no surefire way to know if that ad was responsible for any sales at all.

On the other hand, with digital marketing, you can measure the ROI of pretty much any aspect of your marketing efforts.

Here are some examples:

Website Traffic

With digital marketing, you can see the exact number of people who have viewed your website’s homepage in real time by using digital analytics software, available in marketing platforms like HubSpot.

You can also see how many pages they visited, what device they were using, and where they came from, amongst other digital analytics data.

This intelligence helps you to prioritize which marketing channels to spend more or less time on, based on the number of people those channels are driving to your website. For example, if only 10% of your traffic is coming from organic search, you know that you probably need to spend some time on SEO to increase that percentage.

With offline marketing, it’s very difficult to tell how people are interacting with your brand before they have an interaction with a salesperson or make a purchase. With digital marketing, you can identify trends and patterns in people’s behavior before they’ve reached the final stage in their buyer’s journey, meaning you can make more informed decisions about how to attract them to your website right at the top of the marketing funnel.

Content Performance and Lead Generation

Imagine you’ve created a product brochure and posted it through people’s letterboxes — that brochure is a form of content, albeit offline. The problem is that you have no idea how many people opened your brochure or how many people threw it straight into the trash.

Now imagine you had that brochure on your website instead. You can measure exactly how many people viewed the page where it’s hosted, and you can collect the contact details of those who download it by using forms. Not only can you measure how many people are engaging with your content, but you’re also generating qualified leads when people download it.

Attribution Modeling

An effective digital marketing strategy combined with the right tools and technologies allows you to trace all of your sales back to a customer’s first digital touchpoint with your business.

We call this attribution modeling, and it allows you to identify trends in the way people research and buy your product, helping you to make more informed decisions about what parts of your marketing strategy deserve more attention, and what parts of your sales cycle need refining.

Connecting the dots between marketing and sales is hugely important — according to Aberdeen Group, companies with strong sales and marketing alignment achieve a 20% annual growth rate, compared to a 4% decline in revenue for companies with poor alignment. If you can improve your customer’s’ journey through the buying cycle by using digital technologies, then it’s likely to reflect positively on your business’s bottom line.

What is the role of digital marketing to a company?

While traditional marketing might exist in print ads, phone communication, or physical marketing, digital marketing can occur electronically and online. This means that there are far more possibilities for brands to reach customers, including email, video, social media, and search engines.

At this stage, digital marketing is vital for your business and brand awareness. It seems like every other brand has a website. And if they don’t, they at least have a social media presence or digital ad strategy. Digital content and marketing is so common that consumers now expect and rely on it as a way to learn about brands.

Long story short, to be competitive as a business owner, you’ll need to embrace some aspects of digital marketing.

Because digital marketing has so many options and strategies associated with it, you can get creative and experiment with a variety of marketing tactics on a budget. With digital marketing, you can also use tools like analytics dashboards to monitor the success and ROI of your campaigns more than you could with a traditional promotional content — such as a billboard or print ad.

How does a business define digital marketing?

Digital marketing is defined by the use of numerous digital tactics and channels to connect with customers where they spend much of their time: online. From the website itself to a business’s online branding assets — digital advertising, email marketing, online brochures, and beyond — there’s a spectrum of tactics that fall under the umbrella of “digital marketing.”

The best digital marketers have a clear picture of how each digital marketing campaign supports their overarching goals. And depending on the goals of their marketing strategy, marketers can support a larger campaign through the free and paid channels at their disposal.

A content marketer, for example, can create a series of blog posts that serve to generate leads from a new ebook the business recently created. The company’s social media marketer might then help promote these blog posts through paid and organic posts on the business’s social media accounts. Perhaps the email marketer creates an email campaign to send those who download the ebook more information on the company. We’ll talk more about these specific digital marketers in a minute.

Types of Digital Marketing

  1. Search Engine Optimization (SEO)
  2. Content Marketing
  3. Social Media Marketing
  4. Pay Per Click (PPC)
  5. Affiliate Marketing
  6. Native Advertising
  7. Marketing Automation
  8. Email Marketing
  9. Online PR
  10. Inbound Marketing
  11. Sponsored Content

Here’s a quick rundown of some of the most common digital marketing tactics and the channels involved in each one.

1. Search Engine Optimization (SEO)

This is the process of optimizing your website to “rank” higher in search engine results pages, thereby increasing the amount of organic (or free) traffic your website receives. The channels that benefit from SEO include websites, blogs, and infographics.

There are a number of ways to approach SEO in order to generate qualified traffic to your website. These include:

2. Content Marketing

This term denotes the creation and promotion of content assets for the purpose of generating brand awareness, traffic growth, lead generation, and customers. The channels that can play a part in your content marketing strategy include:

Want to learn and apply content marketing to your business? Check out HubSpot Academy’s free content marketing training resource page.

3. Social Media Marketing

This practice promotes your brand and your content on social media channels to increase brand awareness, drive traffic, and generate leads for your business. The channels you can use in social media marketing include:

If you’re new to social platforms, you can use tools like HubSpot to connect channels like LinkedIn and Facebook in one place. This way, you can easily schedule content for multiple channels at once, and monitor analytics from the platform as well.

On top of connecting social accounts for posting purposes, you can also integrate your social media inboxes into HubSpot, so you can get your direct messages in one place.

4. Pay Per Click (PPC)

PPC is a method of driving traffic to your website by paying a publisher every time your ad is clicked. One of the most common types of PPC is Google Ads, which allows you to pay for top slots on Google’s search engine results pages at a price “per click” of the links you place. Other channels where you can use PPC include:

5. Affiliate Marketing

This is a type of performance-based advertising where you receive commission for promoting someone else’s products or services on your website. Affiliate marketing channels include:

6. Native Advertising

Native advertising refers to advertisements that are primarily content-led and featured on a platform alongside other, non-paid content. BuzzFeed-sponsored posts are a good example, but many people also consider social media advertising to be “native” — Facebook advertising and Instagram advertising, for example.

7. Marketing Automation

Marketing automation refers to the software that serves to automate your basic marketing operations. Many marketing departments can automate repetitive tasks they would otherwise do manually, such as:

8. Email Marketing

Companies use email marketing as a way of communicating with their audiences. Email is often used to promote content, discounts and events, as well as to direct people toward the business’s website. The types of emails you might send in an email marketing campaign include:

9. Online PR

Online PR is the practice of securing earned online coverage with digital publications, blogs, and other content-based websites. It’s much like traditional PR, but in the online space. The channels you can use to maximize your PR efforts include:

10. Inbound Marketing

Inbound marketing refers to a marketing methodology wherein you attract, engage, and delight customers at every stage of the buyer’s journey. You can use every digital marketing tactic listed above, throughout an inbound marketing strategy, to create a customer experience that works with the customer, not against them. Here are some classic examples of inbound marketing versus traditional marketing:

11. Sponsored Content

With sponsored content, you as a brand pay another company or entity to create and promote content that discusses your brand or service in some way.

One popular type of sponsored content is influencer marketing. With this type of sponsored content, a brand sponsors an influencer in its industry to publish posts or videos related to the company on social media.

Another type of sponsored content could be a blog post or article that is written to highlight a topic, service, or brand.

To learn more about sponsored content, check out this blog post.

Digital Marketing Examples

  1. Lego’s Rebuild the World Campaign
  2. Dove’s Real Beauty Campaign
  3. Jennifer Lopez’s #InTheMorningChallenge
  4. Always’ #LikeAGirl Campaign

1. Lego’s Rebuild the World Campaign

This is a great example of a digital marketing campaign because it says something about the brand. In this campaign, Lego takes a stance on important global issues as a way to connect with its audience.

In this day and age, it’s becoming increasingly important for companies to discuss global issues and show align with their customers in that way. The major play with this campaign is to help share the brand’s story and messaging.

Given that 89% of customers shop from brands that share their values, this was a good move for the toy brand.

2. Dove’s Real Beauty Campaign

This is one of my favorite digital marketing campaigns. In the Dove Real Beauty campaign, Dove had a forensic artist draw women as they saw themselves and then as strangers saw them.

This is an excellent example of what marketing content will look like when you know your audience intimately. By knowing its audience of real women, Dove was able to start a movement. In fact, this video has over 68 million views on YouTube.

The powerful video barely mentioned the product, but inspired women around the world.

3. Jennifer Lopez’s #InTheMorningChallenge

In this social media campaign, Jennifer Lopez created a dance challenge to promote her new song. With this challenge, fans would do the same dance in their pajamas and in dress up clothes.

This was a successful social media campaign as the video had over 13 million views and over 5,000 posts.

Using social media is a great way to engage your audience and get them to participate with your brand one on one.

4. Always’ #LikeAGirl Campaign

This is another digital campaign that focuses on emotional marketing. With this campaign, Always wanted to teach girls and young women how to be confident and take back the phrase “like a girl.”

Again, this isn’t a campaign where the product is mentioned much, but that isn’t the point. The point of this digital campaign was to inspire its audience. With that message, they could reach even more people, increase brand awareness, and show their audience that the brand aligns with their values.

What does a digital marketer do?

Digital marketers are in charge of driving brand awareness and lead generation through all the digital channels — both free and paid — that are at a company’s disposal. These channels include social media, the company’s own website, search engine rankings, email, display advertising, and the company’s blog.

The digital marketer usually focuses on a different key performance indicator (KPI) for each channel so they can properly measure the company’s performance across each one. A digital marketer who’s in charge of SEO, for example, measures their website’s “organic traffic” — of that traffic coming from website visitors who found a page of the business’s website via a Google search.

Digital marketing is carried out across many marketing roles today. In small companies, one generalist might own many of the digital marketing tactics described above at the same time. In larger companies, these tactics have multiple specialists that each focus on just one or two of the brand’s digital channels.

Here are some examples of these specialists:

SEO Manager

Main KPIs: Organic traffic

In short, SEO managers get the business to rank on Google. Using a variety of approaches to search engine optimization, this person might work directly with content creators to ensure the content they produce performs well on Google — even if the company also posts this content on social media.

Content Marketing Specialist

Main KPIs: Time on page, overall blog traffic, YouTube channel subscribers

Content marketing specialists are the digital content creators. They frequently keep track of the company’s blogging calendar, and come up with a content strategy that includes video as well. These professionals often work with people in other departments to ensure the products and campaigns the business launches are supported with promotional content on each digital channel.

Social Media Manager

Main KPIs: Follows, Impressions, Shares

The role of a social media manager is easy to infer from the title, but which social networks they manage for the company depends on the industry. Above all, social media managers establish a posting schedule for the company’s written and visual content. This employee might also work with the content marketing specialist to develop a strategy for which content to post on which social network.

(Note: Per the KPIs above, “impressions” refers to the number of times a business’s posts appear on the newsfeed of a user.)

Marketing Automation Coordinator

Main KPIs: Email open rate, campaign click-through rate, lead-generation (conversion) rate

The marketing automation coordinator helps choose and manage the software that allows the whole marketing team to understand their customers’ behavior and measure the growth of their business. Because many of the marketing operations described above might be executed separately from one another, it’s important for there to be someone who can group these digital activities into individual campaigns and track each campaign’s performance.

Inbound Marketing vs. Digital Marketing: Which Is It?

On the surface, the two seem similar: Both occur primarily online, and both focus on creating digital content for people to consume. So what’s the difference?

The term “digital marketing” doesn’t differentiate between push and pull marketing tactics (or what we might now refer to as ‘inbound’ and ‘outbound’ methods). Both can still fall under the umbrella of digital marketing.

Digital outbound tactics aim to put a marketing message directly in front of as many people as possible in the online space — regardless of whether it’s relevant or welcomed. For example, the garish banner ads you see at the top of many websites try to push a product or promotion onto people who aren’t necessarily ready to receive it.

On the other hand, marketers who employ digital inbound tactics use online content to attract their target customers onto their websites by providing assets that are helpful to them. One of the simplest yet most powerful inbound digital marketing assets is a blog, which allows your website to capitalize on the terms which your ideal customers are searching for.

Ultimately, inbound marketing is a methodology that uses digital marketing assets to attract, engage, and delight customers online. Digital marketing, on the other hand, is simply an umbrella term to describe online marketing tactics of any kind, regardless of whether they’re considered inbound or outbound.

Does digital marketing work for all businesses?

Digital marketing can work for any business in any industry. Regardless of what your company sells, digital marketing still involves building out buyer personas to identify your audience’s needs, and creating valuable online content. However, that’s not to say all businesses should implement a digital marketing strategy in the same way.

B2B Digital Marketing

If your company is business-to-business (B2B), your digital marketing efforts are likely to be centered around online lead generation, with the end goal being for someone to speak to a salesperson. For that reason, the role of your marketing strategy is to attract and convert the highest quality leads for your salespeople via your website and supporting digital channels.

Beyond your website, you’ll probably choose to focus your efforts on business-focused channels like LinkedIn where your demographic is spending their time online.

B2C Digital Marketing

If your company is business-to-consumer (B2C), depending on the price point of your products, it’s likely that the goal of your digital marketing efforts is to attract people to your website and have them become customers without ever needing to speak to a salesperson.

For that reason, you’re probably less likely to focus on ‘leads’ in their traditional sense, and more likely to focus on building an accelerated buyer’s journey, from the moment someone lands on your website, to the moment that they make a purchase. This will often mean your product features in your content higher up in the marketing funnel than it might for a B2B business, and you might need to use stronger calls-to-action (CTAs).

For B2C companies, channels like Instagram and Pinterest can often be more valuable than business-focused platforms LinkedIn.

What types of digital content should I create?

The kind of content you create depends on your audience’s needs at different stages in the buyer’s journey. You should start by creating buyer personas (use these free templates, or try makemypersona.com) to identify what your audience’s goals and challenges are in relation to your business. On a basic level, your online content should aim to help them meet these goals, and overcome their challenges.

Then, you’ll need to think about when they’re most likely to be ready to consume this content in relation to what stage they’re at in their buyer’s journey. We call this content mapping.

With content mapping, the goal is to target content according to:

In terms of the format of your content, there are a lot of different things to try. Here are some options we’d recommend using at each stage of the buyer’s journey:

Awareness Stage

Consideration Stage

Decision Stage

How to Do Digital Marketing

  1. Define your goals.
  2. Identify your target audience.
  3. Establish a budget for each digital channel.
  4. Strike a good balance between paid and free digital strategies.
  5. Create engaging content.
  6. Optimize your digital assets for mobile.
  7. Conduct keyword research.
  8. Iterate based off the analytics you measure.

1. Define your goals.

When you’re first getting started with digital marketing, it’s critical you start by identifying and defining your goals, since you’ll craft your strategy differently depending on those goals. For instance, if your goal is to increase brand awareness, you might want to pay more attention to reaching new audiences via social media.

Alternatively, perhaps you want to increase sales on a specific product — if that’s the case, it’s more important you focus on SEO and optimizing content to get potential buyers on your website in the first place. Additionally, if sales is your goal, you might test out PPC campaigns to drive traffic through paid ads.

Whatever the case, it’s easiest to shape a digital marketing strategy after you’ve determined your company’s biggest goals.

2. Identify your target audience.

We’ve mentioned this before, but one of the biggest benefits of digital marketing is the opportunity to target specific audiences – however, you can’t take advantage of that benefit if you haven’t first identified your target audience.

Of course, it’s important to note, your target audience might vary depending on the channel or goal(s) you have for a specific product or campaign.

For instance, perhaps you’ve noticed most of your Instagram audience is younger and prefers funny memes and quick videos — but your LinkedIn audience tends to be older professionals who are looking for more tactical advice. You’ll want to vary your content to appeal to these different target audiences.

If you’re starting from scratch, feel free to take a look at How to Find Your Target Audience.

3. Establish a budget for each digital channel.

As with anything, the budget you determine really depends on what elements of digital marketing you’re looking to add to your strategy.

If you’re focusing on inbound techniques like SEO, social media, and content creation for a preexisting website, the good news is you don’t need very much budget at all. With inbound marketing, the main focus is on creating high quality content that your audience will want to consume, which unless you’re planning to outsource the work, the only investment you’ll need is your time.

You can get started by hosting a website and creating content using HubSpot’s CMS. For those on a tight budget, you can get started using WordPress hosted on WP Engine, using a simple them from StudioPress, and building your site without code using the Elementor Website Builder for WordPress.

With outbound techniques like online advertising and purchasing email lists, there is undoubtedly some expense. What it costs comes down to what kind of visibility you want to receive as a result of the advertising.

For example, to implement PPC using Google AdWords, you’ll bid against other companies in your industry to appear at the top of Google’s search results for keywords associated with your business. Depending on the competitiveness of the keyword, this can be reasonably affordable, or extremely expensive, which is why it’s a good idea to focus building your organic reach, too.

4. Strike a good balance between paid and free digital strategies.

An digital marketing strategy likely needs both paid and free aspects to truly be effective.

For instance, if you spend time building comprehensive buyer personas to identify the needs of your audience, and you focus on creating quality online content to attract and convert them, then you’re likely to see strong results within the first six months despite minimal ad spend.

However, if paid advertising is part of your digital strategy, then the results might come even quicker.

Ultimately, it’s recommended to focus on building your organic (or ‘free’) reach using content, SEO, and social media for more long-term, sustainable success.

When in doubt, try both, and iterate on your process as you learn which channels — paid or free – perform best for your brand.

5. Create engaging content.

Once you know your audience and you have a budget, it’s time to start creating content for the various channels you’re going to use. This content can be social media posts, blog posts, PPC ads, sponsored content, email marketing newsletters, and more.

Of course, any content you create should be interesting and engaging to your audience because the point of marketing content is to increase brand awareness and improve lead generation.

6. Optimize your digital assets for mobile.

Another key component of digital marketing is mobile marketing. In fact, smartphone usage as a whole accounts for 69% of time spent consuming digital media in the U.S., while desktop-based digital media consumption makes up less than half — and the U.S. still isn’t mobile’s biggest fan compared to other countries.

This means it’s essential to optimize your digital ads, web pages, social media images, and other digital assets for mobile devices. If your company has a mobile app that enables users to engage with your brand or shop your products, your app falls under the digital marketing umbrella, too.

Those engaging with your company online via mobile devices need to have the same positive experience as they would on desktop. This means implementing a mobile-friendly or responsive website design to make browsing user-friendly for those on mobile devices. It might also mean reducing the length of your lead generation forms to create a hassle-free experience for people downloading your content on-the-go. As for your social media images, it’s important to always have a mobile user in mind when creating them, as image dimensions are smaller on mobile devices and text can be cut-off.

There are lots of ways you can optimize your digital marketing assets for mobile users, and when implementing any digital marketing strategy, it’s hugely important to consider how the experience will translate on mobile devices. By ensuring this is always front-of-mind, you’ll be creating digital experiences that work for your audience, and consequently achieve the results you’re hoping for.

7. Conduct keyword research.

Digital marketing is all about reaching targeted audiences through personalized content — all of which can’t happen without effective keyword research.

Conducting keyword research is critical for optimizing your website and content for SEO and ensuring people can find your business through search engines. Additionally, social media keyword research can be helpful for marketing your products or services on various social channels, as well.

Even if you don’t have a full-time SEO strategist, you’ll still want to conduct keyword research. Try creating a list of high-performing keywords that relate to your products or services, and consider long-tail variations for added opportunities.

8. Iterate based off the analytics you measure.

Finally, to create an effective digital marketing strategy for the long-term, it’s vital your team learn how to pivot based off analytics.

For instance, perhaps after a couple of months you find your audience isn’t as interested in your content on Instagram anymore — but they love what you’re creating on Twitter. Sure, this might be an opportunity to re-examine your Instagram strategy as a whole, but it might also be a sign that your audience prefers a different channel to consume branded content.

Alternatively, perhaps you find an older web page isn’t getting the traffic it used to. You might consider updating the page or getting rid of it entirely to ensure visitors are finding the freshest, most relevant content for their needs.

Digital marketing provides businesses with incredibly flexible opportunities for continuous growth — but it’s up to you to take advantage of them.

I’m ready to try digital marketing. Now what?

If you’re already doing digital marketing, it’s likely that you’re at least reaching some segments of your audience online. No doubt you can think of some areas of your strategy that could use a little improvement, though.

That’s why we created — a step-by-step guide to help you build a digital marketing strategy that’s truly effective, whether you’re a complete beginner or have a little more experience. You can download it for free here.

Editor’s Note: This blog post was originally published in September 2019, but was updated for comprehensiveness.

Originally published Mar 16, 2021 7:00:00 AM, updated March 16 2021

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