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Why Does the Sum of Users in a Report Not Add Up?link
Questionlink
Why does the sum of users in a report not add up to the total in Google Analytics?
Environmentlink
Connector: Google Analytics
Answerlink
You shouldn't add the number of users in Google Analytics because a single user can have multiple sessions (for example, a user can log in at various times). Every time a user visits your site, they are counted as a new user, even if it's the same user.
Causelink
The mismatch in the number of users usually happens when you compare the data synced to your destination with what you see on the Google Analytics UI.