Note: Nielsen Online’s AdRelevance service uses a proprietary methodology for estimating online advertising expenditures and only takes into account image-based technologies and advertising sold per CPM. Above data does not reflect house advertising activity, strategic partnerships between publishers and advertisers, or text units, compound image/text ads, paid search, sponsorships, email, units contained within applications (e.g., messengers and pre-rolls) or performance based advertising.
Current AdRelevance spending/revenue tables shouldn’t be compared with AdRelevance data published before February 2008, because the current data excludes compound image/text ads whereas previous data included it.
Drill-down:
It is used to describe articles that are stemmed from a single lead article that give a more in-depth or detailed information of the same subject.
