How to competently move to a new domain with new content?

Question

Search Engine Optimization

I didn't find anything really on this particular issue, so I decided to turn here.
The situation is this. There are two sites. One is old and works, the second is new (completely: design, content, only services, their cost and the name of the company are the same).
We are going to take a new domain for a new site, but what should we do with the old one?
I don’t want to set up reindexing and it makes no sense, since the content is new, besides, ancient purchased links in a decent amount link to the old site, there is no desire to deal with this, I suspect that Yandex will be dissatisfied with such reindexing. So there is an idea to just score on the old site, but how to do this, given that the name of the company is the same?
How will the search engines react to this (mostly interested in Yandex), what actions will be the most optimal in this case, and how quickly will it all be indexed?

Answer 1

Search engines see two different domains as two unrelated resources.
Their ranking and rating will not depend on each other.
Just do not forward 301 from one site to another, and do not designate the second site as a mirror in Yandex.Webmaster/Google Search Console/robots.txt.

Answer 2

I would probably leave both sites. On the old message, with a proposal to visit the new site and information that the data on this is no longer relevant. You can even make it pop up.

Answer 3

If the old site is under any sanctions from search engines, then it is better to close it from indexing and redirect to a new site using js/meta tags.
If the old site was not under any sanctions, then why not make a 301 redirect? Well, yes, somewhere there are old links to the old domain - but there is nothing unnatural in this. At the same time, you can even get confused and make the right redirects for certain pages (for service description pages, for example).
In any case, you should not leave the old site - this is your direct competitor. Do you really want some of your customers to see an old ugly site instead of a new and trendy one?

Answer 4

Correctly do this:
the content of the old site - send each article with a 301 redirect to the same article on the new site (or a newer article on the new site), if there is no place for the old article to redirect it, then it is better to copy it and paste it into the new site and do forwarding. (this way you save all links and trust from search engines)
Redirect the main page to the main one.