eCPM

eCPM, or "effective cost per thousand impressions," is a metric used in online advertising to measure how much revenue an ad generates for every 1,000 times it is viewed. It helps advertisers and publishers understand the earning potential of ad placements. For example, if an ad earns $50 from 1,000 views, the eCPM is $50. It considers both how often an ad is shown (impressions) and how much money it makes, providing a standardized way to compare the profitability of different ad campaigns or placements.