"A tooltip is a brief, informative message that appears when a user interacts with an element in a graphical user interface (GUI). Tooltips are usually initiated in one of two ways: through a mouse-hover gesture or through a keyboard-hover gesture. Tooltips can be attached to any active element (icons, text links, buttons, etc.) on a page. They provide descriptions or explanations for their paired element. Thus, tooltips are highly contextual and specific and don’t explain the bigger picture or entire task flow."