Learn business growth with Google Analytics 4 › Forums › Google Analytics 4 › Determining Independent Client IDs for Google Analytics 3 and Google Analytics 4 on a Single Page › Reply To: Determining Independent Client IDs for Google Analytics 3 and Google Analytics 4 on a Single Page
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In simpler terms, what you are experiencing is because Google Analytics 4 (GA4) doesn’t use the same method for client ID tracking as Google Analytics 3 (GA3) does. While GA3 uses “_ga” cookies, GA4 provides this ID differently. Therefore, when using both on the same page, they are not sharing the same client ID, they just work in different ways.