# Cost per thousand impressions

The cost of 1,000 impressions. It is usually shortened to CPM.

The cost of 1,000 impressions. It is usually shortened to CPM.

This is also called cost per mille (CPM). Mille means one thousand.

## An example

If a campaign spends $20 for 10,000 impressions, its CPM is $2.

## Why it matters

Use the same impression definition when comparing prices. Visibility and relevance still matter.


## Related terms
- [Cost per click](https://jolts.xyz/resources/glossary/cost-per-click)
- [Impression](https://jolts.xyz/resources/glossary/impression)
- [Viewable impression](https://jolts.xyz/resources/glossary/viewable-impression)
## Related articles
- [Can one sponsored placement pay for an AI answer?](https://jolts.xyz/blog/can-one-placement-pay-for-an-answer)

## Next step

[Explore advertising](https://jolts.xyz/advertisers) or [monetize your AI app](https://jolts.xyz/publishers).