Having the capability to precisely quantify the contribution that a marketing program or strategy has actually had upon income and revenues is the holy grail of marketing measurement. With the amount of cash brands are buying their digital marketing programmes today, it is incredibly crucial that they comprehend the worth of their financial investment. Yet, as the expert interviews carried out for this report reveal, there stays little market agreement over the very best method to do this, and extensively differing approaches and approaches remain in play.This best practice report seeks to bring clearness to the problem of how online marketers can be calculating the ROI of their digital marketing investments, within both B2B and B2C industries. Through insights originated from interviews with senior marketers and industry professionals with seasoned know-how in this field, it will take a look at the current trends emerging in ROI within the context of digital marketing and consider the pros and cons of the different techniques, methodologies and frameworks being used. It will likewise discuss the essential difficulties online marketers face when it comes to putting ROI into practice and how these are conquered. The inclusion of four brand name cases research studies will likewise assist to bring to light some of the lessons and insights being shared.Econsultancy would like to thank the list below professionals who contributed to this report: Shannon Aronson, SVP, Digital Strategic Consulting, Epsilon Raj Balasundaram, VP Solutions and Strategic Services, Emarsys Christopher Baldwin, Head of Marketing in Northern Europe,