How to clear the cache for all users?

Question

caching

The site has been redesigned. This design has been moved from another host. The problem is that when people visit the site, they see what was on the new, but still unfinished site, when it was not yet transferred to another hosting. ATTENTION QUESTION: How to remove the cache from all users so that they can see and use the new service that is available today, and not see the old unfinished pages? Please please help! Thanks in advance.
( SITE ON WORDPRESS )

Answer 1

If only styles have changed, then you need to change the version of style.css and update the design for all users

Answer 2

Problem with content or styles?
If with style, add the ending to functions.php for css files: style.css?ver=1.1
If with content, reset the cache on the server itself.