Your Footer Module typically shows your site copyright information (but can be used to show almost anything you like), and typically located at or very near the bottom of the page.

You can see the usingjoomla.com Footer Module at the very bottom of every page and does indeed include our Copyright information

In Joomla version 3.10.x Modules are created and managed via the administrator area menu 'Extensions' tab.

In Joomla version 3.10.x Modules are created and managed via the Administrator area 'Extensions' tab and then selecting the 'Modules' tab.

In Joomla version 3.10.x Modules are created and managed via the Administrator area 'Extensions' tab and then selecting the 'Modules' tab.

Footer Module Help