How to Manage Menu Items in Joomla
Menus are the navigational framework but without menu items there wouldn't be pages on your Joomla site.
Go to Menus > Menu Manager-> Menu Manager and then click on the Menu Items tab.
New - Creates a new menu item.
Edit - Changes an existing menu item.
Publish/Unpublish - Changes the visibility status of a menu item.
Check in - Changes a menu item from checked out to check in to allow editing of the menu item.
Trash - Deletes the menu item.
Home - Sets a specific menu item as the home/landing page.
Rebuild - Recreates the menu items table in case of corruption.
Help - Opens the relevant help articles for the area of Joomla you are in.