What is CPM?

CPM (Cost Per Mille) is a digital advertising metric that represents the cost to deliver 1,000 ad impressions. The term mille means one thousand, so CPM measures how much an advertiser pays every time their ad is shown one thousand times.

CPM is commonly used in display advertising, programmatic advertising, streaming TV (CTV), and social media campaigns where the goal is to reach a large audience.

CPM Formula

CPM = (Total Cost ÷ Total Impressions) × 1,000

This metric helps marketers understand the cost efficiency of their advertising reach and compare pricing across different platforms and campaigns.