Modules are small blocks of content that can be displayed in positions on a web page. The menus on this site are displayed in modules. The core of Joomla! includes 17 separate modules ranging from login to search to random images. Each module has a name that starts mod_ but when it displays it has a title. In the descriptions in this section, the titles are the same as the names.
Articles Modules
Content modules display article and other information from the content component.
User Modules
User modules interact with the user system, allowing users to login, showing who is logged in, and showing the most recently registered users.
Display Modules
These modules display information from other components.
Utility Modules
Utility modules provide useful functionality such as search, syndication, and statistics.
Menus
Menus provide navigation and structure to your site.