What's it called · UI components 12

Popover

A small panel opens beside the activated element to show related information or a short form without leaving the current screen.

Open Share, enter an email, send an invite, then tap outside.

Often confused with

• Tooltip: A one-line hint that appears on hover or long press
• Dropdown: Unfolds a list of options to choose from
• Context menu: Commands for an item, opened by long press or right-click