The effective cost per thousand ad impressions. eCPM is used as a tool by advertisers when they are comparing ad networks or evaluating the success of an ad-based monetization strategy.
eCPM is calculated by dividing total earnings by total number of impressions in thousands. It is a great performance measure for your various ad units, so when comparing, we use eCPM to compare your results.
The formula is: (Total Spend ÷ Impressions) x 1000