What is eCPM (Effective Cost per Thousand Impressions)

eCPM, or Effective Cost per Thousand Impressions, is a metric used to assess ad effectiveness and calculate the revenue generated within several marketing channels. In order to measure eCPM, one should divide the total earnings by the total impressions number. If this amount is less than the average price of CPM, it means you’re not using all of your traffic potential for monetization.