How to change the title correctly?

Question

Search Engine Optimization

The situation is this, there is an old blog on WordPress with not much traffic, the headings are written there not quite right. I want to change the headings, but how will Yandex react to this? And another question is whether it is necessary to change the link and put redirects from old pages to new ones?

Answer 1

How will Yandex react to this?

Will update the data in the index after the next visit of the bot and increase / decrease in the issue, depending on the "quality" of the new heading compared to the old one
You can leave the link, it is not necessary to change it. If it has completely different keywords and it does not reflect the new title of the page, then change it, and a redirect, of course, is needed. WordPress itself redirects from old to new when renaming existing pages, but many prefer to control this thing manually and at the server level.

Answer 2

If the headings are more relevant to user requests than they were, then they will likely increase in positions, if not, then they will rather lower them.