CPM: cost-per-mille

CPM, also called cost per mille, is a marketing term used to denote the price of 1,000 advertisement impressions on one webpage. If a website publisher charges $2.00 CPM, that means an advertiser must pay $2.00 for every 1,000 impressions of its ad.

CPM is a key metric for measuring the success of your advertising efforts, and it is often used to track progress over time.