GMS Ads is the ad server and ad manager behind 55GMS. One script tag in the shared site template serves correctly sized ads on every 55GMS domain.

Admins sign in with Authometry, upload creatives, run several weighted campaigns at once, and see impressions, clicks, CTR, and per-domain breakdowns. Browsers never talk to the ad server directly: an edge module on the 55GMS server serves from a cached manifest and reports stats back in hourly batches.