FAQ: Should I track traffic from all subdomains within a single GA4 property via a single data stream or set up individual data streams for each subdomain?

Pros of setting up individual data streams for each subdomain:

» GA4 tracks the data for each subdomain separately, which can be useful if you want to see data specifically for each subdomain rather than combined data for all subdomains.

» GA4 will not double-count the traffic as it uses a unique measurement ID for each data stream. However, if a user moves between subdomains without cross-domain tracking, they may be counted as new users in each data stream.

Cons of setting up individual data streams for each subdomain:

» GA4 will not automatically track traffic across all subdomains within a single property, and you will have to set up cross-domain tracking manually.

» Users moving between subdomains may be counted as new users unless cross-domain tracking is set up.

» Sessions may restart when a user moves between subdomains.