What is Effective Cost Per Thousand (eCPM)? | Measure Ad Revenue Effectively in 2026
What is eCPM? Effective cost per mille (eCPM) measures revenue earned for every 1,000 ad impressions. Publishers and advertisers use it to compare campaign profitability regardless of whether they buy on CPM, CPC, or CPA. Track eCPM alongside ad inventory performance on ad exchanges and in broader paid media programs.