There are several scenarios when a redirect becomes necessary in WordPress. On the one hand, it’s useful when pages are outdated, redundant and thus are deleted. A user who searches for a URL, should not land on an error page. Where content is current, but the respective post has been moved to a new URL, a WordPress redirect becomes all the more important. This commonly occurs after you restructure your website or change the WordPress domain. In that case, redirection helps users find the post they are looking for.
But even when a page has neither been deleted nor migrated, sometimes a WordPress redirect is necessary. Namely, if you purchase a SSL certificate and switch your website from HTTP to HTTPS the old URL will no longer be accessible. In order for the content to remain accessible, a redirect to the new WordPress site must occur. The conversion to HTTPS in WordPress is recommended for all website owners, because the certificate boosts security for visitors and can have a positive effect on your search engine ranking.