Mixpanel's Recommendation for $identify Usage with Logged-in Users

Mixpanel recommends calling .identify() (which triggers the $identify event) only for logged-in (authenticated) users because this method is intended to associate all activity—both before and after login—with a single, known user identity. If you call .identify() for anonymous users, you risk incorrectly merging anonymous activity with a specific user, which can lead to inaccurate user profiles and data.Specifically: - The value you pass to .identify() should uniquely and persistently identify a user across all their devices and sessions. Anonymous users, by definition, do not have such a stable identifier yet, so calling .identify() for them can create confusion and data integrity issues. - Calling .identify() for anonymous users can result in multiple users being merged into a single profile if they share a device or browser, which is not the intended behavior. - Mixpanel's best practice is to use .identify() only when you know the user's true identity (e.g., after login or registration), ensuring that all pre-login (anonymous) and post-login (identified) events are correctly stitched together for that user, and not incorrectly merged with others' data Managing User Identity - Javascript Managing User Identity - Android Tealium Integration.In summary, only calling .identify() for logged-in users ensures accurate user tracking and prevents data from different users from being merged incorrectly.

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