# Viewable impression

An impression that meets a defined visibility rule. Receiving an ad response alone is not enough.

An impression that meets a defined visibility rule. Receiving an ad response alone is not enough.

## An example

An ad below the screen is not counted as viewable until it meets the agreed visibility threshold.

## Why it matters

Clear rules help distinguish an available ad from one a person could actually see.


## Related terms
- [Ad placement](https://jolts.xyz/resources/glossary/ad-placement)
- [Cost per thousand impressions](https://jolts.xyz/resources/glossary/cost-per-thousand-impressions)
- [Impression](https://jolts.xyz/resources/glossary/impression)

## Next step

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