# Events

Recorded actions or changes that a system uses for reporting or processing.

Recorded actions or changes that a system uses for reporting or processing.

## An example

An app records an ad impression, an offer click and a completed purchase as separate events.

## Why it matters

Use stable event definitions and identifiers so retries do not inflate the results.


## Related terms
- [Ad placement](https://jolts.xyz/resources/glossary/ad-placement)
- [Ad spend](https://jolts.xyz/resources/glossary/ad-spend)
- [Advertiser](https://jolts.xyz/resources/glossary/advertiser)
- [Publisher](https://jolts.xyz/resources/glossary/publisher)

## Next step

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