A menu displays a list of relevant options for the user that can be triggered from a button.
A menu pops up when users interact with a button, an action, or another control. Menus allow users to select from a list of options.
Behavior and Interaction
A dropdown menu is a list of options that a user can act on. It appears after a user taps on an icon or a button or performs a specific action.
A dropdown menu normally appears below the element that generates it.
Menu on mobile (left) and tablet (right)
Menus display lists of related options (options may be grouped together with a divider) as well as unrelated options. They can contain a scrollbar and icons.