# CPM

Concept · [Business and metrics](https://ecosystem.samcarlton.com/business)

Also called: cost per mille, cost per thousand, cost per thousand impressions

Cost per thousand impressions. The price an advertiser pays for an ad to be shown 1,000 times, whether or not anyone clicks.

**For example:** An app sells ad space at a CPM of a few dollars, so a million views earns a few thousand dollars.

## Connects to (4)

- [Pay-per-click advertising](https://ecosystem.samcarlton.com/ppc): Online ads where you pay each time someone clicks, most often shown beside search results.
- [Programmatic advertising](https://ecosystem.samcarlton.com/programmatic-advertising): Buying and selling online ad space automatically through software, often in auctions that run in a fraction of a second as a page loads.
- [Ad exchange](https://ecosystem.samcarlton.com/ad-exchange): The digital marketplace where ad space from sellers is auctioned to advertisers in real time.
- [Campaign budget optimization](https://ecosystem.samcarlton.com/campaign-budget-optimization): An ad platform setting that shares one budget across several ad groups and moves money automatically toward whichever is performing best.

Map view: https://ecosystem.samcarlton.com/cpm