What are Legacy URLs?:
Legacy URLs are essentially 301 redirect pages. You can map "Legacy" (meaning older) URLs from your old site sitemap to your new sitemap so that users do not receive error messages for bookmarked pages or search results. This can be beneficial to your site's SEO. A Legacy URL can also be used to direct a visitor from one URL on your site to another one anywhere on the web.
Setup a Legacy URL:
1. Select the Settings icon in the gray navigation bar and select Legacy URLs under the Settings header.
2. Complete the first field (Redirect from) with the URL that users will enter in their browser. Do not include the domain name, only everything after the forward slash at the end of your domain, like this: "/web-store"
3. Complete the second field (Redirect to) with the URL that the users will actually arrive at. If you type the name of a page on your site, you can select it by its title. You may also enter a URL, such as "/store"
4. Select the blue Save button to add your new Legacy URL redirect.
Note: Even though Legacy URLs don’t trigger the Publish button, it’s recommended to republish after adding Legacy URLs. This will ensure the redirects take immediate effect by clearing the internal cache of the website.