How to track visit statistics for an additional domain?

Question

PHP

Hey!
There is a main site site.ru.
In offline advertising, we decided to use a different domain and registered site1.ru.
The question arose, how to track attendance in analytics systems (g.analytics, i.metrica)?
First, I decided to write a 301 redirect from site1.ru to site.ru in htaccess. But in this case, the analytics systems will not "see" the correct source of the visit? Or will they see?
Tell me, how best to organize redirects? Can redirect to the main site and add utm tag:
site.ru?utm_source=offline_promo

Answer 1

Is your site now available on two domains?
If you use a redirect, then you can't do without a label.