Is a domain alias good or bad in terms of SEO?

Question

Search Engine Optimization

Hello :)
Question - add. Is domain alias good or bad in terms of SEO?
Let's say I'm launching the site bestservice.ru, but I'm thinking of adding a shorter name bs.ru and an international version of bs.com in the future. In the hoster's admin panel, I will link all these 3 domains to one site, how seo-correct it will be, if it matters at all for the search engine? As a result, I will promote it as bs.ru.
The thing is that so far I chose a temporary name because I didn’t come up with / didn’t find the optimal chtoli))
And are there any restrictions, for example, there will be 3-5 domains for one site later.
Thanks in advance!

Answer 1

It is better to immediately decide on the main version of the domain, because if you switch the main mirror, the site may sag in the search results. And so, from the point of view of SEO, it doesn’t matter how many aliases there are - as many as you like)