Is it enough to set up a 301 redirect from the old one on the web server to move the site to a new domain?

Question

Search Engine Optimization

In order not to lose the existing promotion , will the
search engines realize that this is the same site, and will not lower it in the search results?

Answer 1

1. Enough (but in Webmaster and Satchconsole it is desirable to move / merge)
2. They will understand (but in Webmaster and Satchconsole it is desirable to move / merge)
3. All the same, they will lower it because the new domain