The strictest of viewability checks
Viewability checks guarantee that advertisers pay only for real impressions. Organizations like the Interactive Advertising Bureau (IAB) provide standards for viewability checks, but Yandex’s standards go even further. In fact, they are twice higher than the IAB recommendation. Yandex considers an impression valid only if at least 50% of the banner ad appears in the active browser window for at least 2 seconds. According to years of observation, Yandex has determined that users need at least 2 seconds to absorb an ad’s message.
This viewability check technology is applied to auctions for all Yandex display ad impressions without exception, including impressions in the Yandex Advertising Network.
How viewability checks work
Banner ads are placed on Yandex services pages and partner sites using a special code which collects detailed data showing how the user interacts with the page in the browser. The system then compares the data with the viewability criteria and judges whether to consider the impression valid.