Redirects are useful tools for several situations. Here are some of the most common instances when you might use redirects on your site:
Temporary page maintenance: When you temporarily take down a page to rework or improve it, you can use a redirect to take users somewhere else in the meantime.
Permanent page deletion: Sometimes, you may completely remove a page from your site, but you’ll still want the links that lead to it, so you’ll redirect to a different URL.
Page merger: Another good time to use a redirect is to merge two separate pages into one. At least one of the original URLs won’t survive the merger, so you can redirect from it.
Domain change: If you create an entirely new website on a different domain, you may want to use redirects on a large scale to preserve the inbound links from the original.
All these situations could call for a redirect.