google is an ad exchange. That means they work as a middleman between advertisers who buy ad space and publishers who sell ad space. google has been authorized to sell the ad space on 15 publisher domains. You can view these domains below.
0% of the publishers we track have authorized google. google's certificate ID is
f08c47fec0942fa0. Verify here .
This information is gathered by crawling ads.txt files on millions of websites. Ads.txt is an initiative developed by Google, the IAB and others to fight ad fraud.