Additional Note: digital display ads transacted or fulfilled via automation, including everything from publisher-erected APIs to more standardized RTB technology; includes instream video such as those appearing before, during or after digital video content in a video player (pre-roll, mid-roll, post-roll video ads) and video overlays; includes social network instream video advertising in platforms such as Facebook Watch and Snapchat Shows; includes outstream video ads such as native, in-feed (including video ads in Facebook's News Feed and X's Promoted Posts), in-article, in-banner and interstitial video ads; appears on desktop and laptop computers as well as mobile phones, tablets and other internet-connected devices for all formats mentioned; data before 2017 excludes outstream video ads
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 from 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.