That’s because the “more” digital ads you buy, the more exposed you are to ad fraud. “Declared” means they can just say what it is, as opposed to “detected” which means some form of analytics independently detected the data. So desktop and mobile web impressions virtually never use real detected data, and pass declared locations instead. A key lesson to learn here is the difference between declared data and detected data, and vast opportunity for fraud created by the pervasive use of declared data in programmatic ad tech. Don’t even get me started on ads.txt, the “miracle drug” from the IAB that they thought would solve ad fraud.

Source: Forbes October 31, 2020 12:34 UTC