- Cost per thousand (CPM), also called cost per mille, is a marketing term used to denote the price of 1,000 advertisement impressions on one web page. If a website publisher charges $2.00 CPM, that means an advertiser must pay $2.00 for every 1,000 impressions of its ad. The “M” in CPM represents the word “mille,” which is Latin for “thousands.”
- Cost per click (CPC) is an online advertising revenue model that websites use to bill advertisers based on the number of times visitors click on a display ad attached to their sites. When the advertiser’s budget is reached, the ad is automatically removed from the website’s rotation for the remainder of the billing period. For example, a website that has a CPC rate of 10 cents would bill an advertiser $100 for 1,000 click-throughs.