Note: digital display ads or fulfilled via automation, including everything from publisher-erected APIs to more standardized RTB technology; includes native ads and ads on social networks like Facebook and Twitter; *excludes network-sold inventory from traditional linear TV and addressable TV advertising; **includes advertising that appears on desktop and laptop computers and other nonmobile internet-connected devices; data after 2016 excludes connected tv devices; ***includes ad spending on tablets
Methodology: Estimates are based on the analysis of various elements related to the ad spending market, including macro-level economic conditions, historical trends of the advertising market, historical trends of each medium in relation to other media, reported revenues of major ad publishers, estimates from other research firms, data from benchmark sources, consumer media consumption trends, consumer device usage trends, and eMarketer interviews with executives at ad agencies, brands, media publishers, and other industry leaders.