How to set up Google Analytics for site mirrors?

Question

Google Analytics

Hello! There is a site with different domain addresses, for example, example1.com , example2.com, example3.com, where example1.com is the main mirror. They refer to different folders on the hosting, but the content is almost completely identical. How to set up Google Analytics so that it correctly takes into account all these mirrors?

Answer 1

or https://support.google.com/analytics/answer/103434...
or https://www.ru.advertisercommunity.com/t5/Bazovye-...
xs what exactly for your case is considered "correct"