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While you could technically use one Google Analytics profile to manage all your sites, it’s probably a better idea to create separate accounts for each one. This way, you can avoid some potential complications down the road. For instance, when you’re extracting data via API, you would have to filter it by domain every time if all your sites were under one account.
Also, Google Analytics has certain restrictions when it comes to creating custom dimensions and metrics, which might limit your data analysis capabilities if you’re juggling multiple sites under a single account. Overall, this structure is particularly beneficial if you’re dealing with separate businesses or different clients.
