# Impression

A recorded event when an ad is shown. The exact counting rule must be stated.

A recorded event when an ad is shown. The exact counting rule must be stated.

## An example

An app records an impression after adding an ad to the page under its agreed counting rule.

## Why it matters

A received ad response and an impression are not automatically the same event.


## Related terms
- [Click-through rate](https://jolts.xyz/resources/glossary/click-through-rate)
- [Cost per thousand impressions](https://jolts.xyz/resources/glossary/cost-per-thousand-impressions)
- [Viewable impression](https://jolts.xyz/resources/glossary/viewable-impression)
## Related articles
- [The chat reconnected. Did you count the ad twice?](https://jolts.xyz/blog/one-impression-after-reconnect)

## Next step

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