Is it true that default Google Analytics tracking code installed on different domains counts users and sessions separately?

The statement is true because the default Google Analytics tracking code is designed to track each domain separately. When the tracking code is implemented on different domains without any special configuration or cross-domain tracking setup, users and sessions from each domain are counted independently. This means that if a user visits multiple domains that have separate tracking codes, each visit would be recorded as a unique user and session for each domain instead of as a single consolidated view across those domains.

To track users across multiple domains effectively and have them counted as a single session in Google Analytics, you would need to implement cross-domain tracking. This involves configuring the tracking code to share the same tracking ID across the domains and adjusting the URL settings to maintain the session across those domains. Without this configuration, data from different domains remains isolated, resulting in separate user and session counts for each.