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google-analyticssegment

Why is there a difference in user count in GA?

In Google Analytics, I can see the number of users from Taguchi/ email is 20,876, but when I use those parameters in a segment the number of users jumps to 21,699 (for the same time period), even when compared to All Users - which should be the same as the Source/Medium report. Not sure why this is happening.

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Solution

  • Considering the number of sessions I think the problem is sampling.

    Sampling thresholds

    Default reports are not subject to sampling.

    Ad-hoc queries of your data are subject to the following general thresholds for sampling:

    • Analytics Standard: 500k sessions at the property level for the date range you are using

    https://support.google.com/analytics/answer/2637192?hl=en

    Try to check the shield in top of your report page to verify if it says that the report is based on all sessions or only on a percentage:

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    In this second case you should reduce the time interval to have data based on 100% of the sessions.