How does Google Ad Manager measure the Adsense eCPM competing with my remnant and house ads?
For AdSense CPC ads, Google Ad Manager considers the bid, clickthrough rate, and other relevant factors across 1000 impressions. The resulting figure is the ad’s effective cost per 1000 impressions (eCPM), used to determine AdSense competition with your remnant and house ads. (Learn how more about AdSense competition.