Administration Menus
Administration Menus are the interfaces displayed in WordPress Administration. They allow you to add option pages for your plugin.
Note:
For information on managing Navigation Menus, see the Navigation Menus chapter of the Theme Developer Handbook.
Top-Level Menus and Sub-Menus
The Top-level menus are rendered along the left side of the WordPress Administration. Each menu may contain a set of Sub-menus.
When deciding between Top-level menus and Sub-menus think carefully about the needs of your plugin as well as the needs of your end users.
Alert:
We recommend developers with a single option page to add it as Sub-menu to one of the existing Top-level menus; such as Settings or Tools.