Advertising
Cost Per Impression
Cost per impression (CPM, cost per mille) is the cost an advertiser pays for one thousand ad impressions. It is commonly used in display and video advertising to measure the cost of reach.
Examples
A brand awareness campaign runs at a CPM of $8, meaning the advertiser pays $8 for every 1,000 times the ad is displayed.
Best Practices
Use CPM bidding for awareness campaigns and track downstream metrics like brand recall to measure the true value of impressions.