How to Change WordPress Permalink Structure of Old Post without Loosing Traffic & NO Broken Link!.
When you change the permalink structure on your WordPress website, the already existing links do not work. They hit the 404 page. You need to set up redirection for the old URLs.
You can set up the redirection using a Redirection plugin or any other plugin with the Redirection module. But, setting up the redirection one by one for all the URLs is a long process.
So, in this video, you will see how you can set up redirection for all the URLs at once, using RegEx (Regular Expression). You can set up redirection for all kinds of URL structures, and you need to do it only once.