Extend existing modules with new function-menu items. Examples are extensions such as 'User>Task Center, Messaging' which adds internal messaging to Typo3. Or 'Web>Info, Page TSconfig' which shows the Page TSconfiguration for a page. Or 'Web>Func, Wizards, Sort pages' which is a wizard for re-ordering pages in a folder.
Enter the title of function-menu item: [moduleFunction][1][title]: [English]
Sub- or main module? [moduleFunction][1][position]:
These images gives you an idea what the options above means: