If you're moving a website from one domain to another, you'll want to set up what's called an htaccess 301 redirect. This type of redirect tells search engines that your content has moved permanently and that they should update their records accordingly. It also helps to ensure that visitors who try to access your old website will be automatically redirected to your new site. There are a few scenarios where you might need to set up an htaccess 301 redirect.
For example, if you're changing the structure of your website, you may need to redirect old pages to new ones. Or, if you're merging two websites together, you may need to shift one of the sites to the other. In any case, setting up an htaccess 301 redirect is a relatively simple process, and it can help to ensure that your website continues to operate smoothly after a change.