What to do if you do not like the domain and how will buying a new one with further gluing affect?

Question

Search Engine Optimization

I bought a project with an old, but ugly and long domain.
But for a long time I wanted to launch my own project in a similar niche and a few years ago I bought a short domain.
How will transferring the site to a new domain and setting up redirects from the old domain affect?
What will happen to the links? - If I leave both domains, will the links affect the ranking of the new one?
Will TPs replace links to the old domain in searches with links to the new domain?
Will all the puzomerkas be transferred or will only a part be transferred, and some cannot be transferred at all?
Perhaps there are some pitfalls?

Answer 1

In any case, there will be some deterioration
. In Yandex, make merging through the merging mechanism in the webmaster; in Google, move to a new domain after merging in Yandex by creating a page redirect from the domain to the new one.