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# FAQ - Monitoring DAU and MAU

## Creating an Active Users Report

<AccordionGroup>
  <Accordion title="Does the Active Users Report also show web event data?">
    Yes, you can query both app and web data in the Active Users Report by selecting app metrics and web metrics when creating a report view.
  </Accordion>

  <Accordion title="How does Airbridge determine unique users for calculating metrics such as DAU, WAU, MAU, and Paying Users?">
    In the Active Users Report, a unique user is determined by the identifier used for the [Calculated by](/en/guides/understanding-the-active-user-report#metrics-and-calculated-by). For more details on the identifiers, refer to this [article](/en/guides/identifiers).
  </Accordion>

  <Accordion title="The sum of the DAU for a month is different from the MAU for the same date range. Why is it so?">
    The Active Users Report aggregates unique users based on the set granularity, and therefore, the sum of the DAU for a month is different from the MAU for the same date range.

    For example, let's say a user launched your app every day for 30 days. The Active User count is aggregated based on the set granularity.

    * Daily: Airbridge aggregates daily unique users. Therefore, the DAU is 1 for each day is 1, and the sum of the DAU is 30.
    * Monthly: Airbridge aggregates monthly unique users. Therefore, the MAU is 1.
  </Accordion>

  <Accordion title="If the MAU is 1, does it mean that 1 user was active for a day during a month?">
    The Active Users Report aggregates unique users based on the set granularity. When the granularity is set to `Monthly`, the Active User Report shows the number of unique users who performed at least 1 app event within a month.

    Therefore, if the MAU is 1, it means 1 unique user performed at least 1 app event within a month. However, you cannot determine whether this user used your app every day or just 1 day during a month.

    The following users are counted as 1 monthly active user (MAU).

    * A user who launched the app only once within a month
    * A user who launched the app once every other day within a month
    * A user who launched the app once every day within a month
  </Accordion>

  <Accordion title="The sum of the items is different before and after applying the GroupBys. Why is it so?">
    Upon configuring GroupBys in the Active Users Report, the unique user count is reaggregated based on the set GroupBys. As a result, the sum of the items after applying the GroupBys may be larger than before.

    For example, let's say a user engaged with an ad from channel A and channel B. When selecting `Channel` as a GroupBy, the user is counted as 1 active user for each channel. This may appear as 2 active users as a sum. However, when removing `Channel` as a GroupBy, only 1 user will be counted as an active user.
  </Accordion>
</AccordionGroup>

<link rel="alternate" hrefLang="en" href="https://help.airbridge.io/en/guides/active-users-report-faq" />

<link rel="alternate" hrefLang="ko" href="https://help.airbridge.io/ko/guides/active-users-report-faq" />