By putting all of your Content into nested Categories you can give users and search engines access to everything using a Menu.
Placing the Site Map Module strategically around your website can give your site visitors additional ease in navigating your website.
Broadly, there are two types of SiteMap: Human readable Site Map, and Search Engine Site Map.
However, it is possible to provide sitemaps for specific types of information, including
In Joomla, Modules are created and managed via the Administrator area.
Using A Sitemap
Modules Related Help Resources
Modules - Options