gmossp-sp.jp is an ad exchange. That means they work as a middleman between advertisers who buy ad space and publishers who sell ad space. gmossp-sp.jp has been authorized to sell the ad space on 1,859 publisher domains. You can view these domains below.
0.21% of the publishers we track have authorized gmossp-sp.jp.
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.