# Monthly active users (MAU)

The number of distinct users meeting an activity rule in a calendar month or stated rolling period.

The number of distinct users meeting an activity rule in a calendar month or stated rolling period.

## An example

A service counts 5,000 users who completed a qualifying action during October.

## Why it matters

Calendar-month and rolling thirty-day figures can differ. Label the window explicitly.


## Related terms
- [Active user](https://jolts.xyz/resources/glossary/active-user)
- [Cohort](https://jolts.xyz/resources/glossary/cohort)
- [Lifetime value (LTV)](https://jolts.xyz/resources/glossary/lifetime-value)
- [Retention rate](https://jolts.xyz/resources/glossary/retention-rate)

## Next step

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