Two domains, one site version. How to promote to 2 different countries?

Question

Search Engine Optimization

There is a site with a domain in the .ru zone. It is planned to purchase a domain in the by zone to promote the site for Belarus. That is, the site is planned to be promoted in two countries, Russia and Belarus. How to implement all this correctly? The two addresses will have the same content on the sites.

Answer 1

It is more correct to promote one domain for one site.