A file called sitemap.xml is automatically created and updated when you make changes in Page Manager.
It contains a list of URLs, which search engines such as Google will ensure they crawl to update their search index.
sitemap.xml is created at the root of your website, for example
If your site has localisation, and you tag pages in Page Manager with one or more locations, only URLs featuring those locations will be added to the sitemap.
This helps to avoid pages which are not intended for certain locations from appearing in search results.