CPM : Cost Per Thousand is the amount you pay per thousand impressions that you receive, the amount has no relation with ad clicks. CPC : Cost Per Click is the amount that you agree with the advertiser to pay only for the clicks you receive on your landing page. CPV: is when advertisers pay for each unique user view of an advertisement or website (usually used with pop-ups, pop-unders and interstitial ads). Cost per view on youtube is more aligned with video marketing, where you pay Google for viewing your ad. CPV may also mean cost per visitor where an advertiser pays you for driving each unique visitor to her site.