Popover/Tooltip/Hovercard - These are passive approaches to showing more information. These are used to add simple instructions or explanations or foreshadow what will happen if you click a link.

A popover is a transient view that shows on a content screen when a user clicks on a control button or within a defined area.

A popover is an interactive HTML tooltip. It can be a dropdown, menu, or any other kind of box that pops out from the normal flow of the document. This type of element contains non-vital functionality and can be hidden behind a click or hover to conserve space.

Both are elements positioned near a "reference" element, and are hidden until they are triggered. They help conserve space by hiding secondary information or functionality behind a hover or click. They are positioned outside the normal flow of the document so when they are triggered, they are overlaid on top of the existing UI without disrupting the flow of content.

Popover is similar to tooltips; it is a pop-up box that appears when user click or hover on an element.

PopupState HelperTo make managing the popover state easier, we can use the material-ui-popup-state library to manage the state.

We can open a popover when we move our mouse over an element.

Popovers let us display some content over other things.

Open About Popover

Popover component is used to manage the presentation of content in a popover. You use popovers to present information temporarily. The popover remains visible until the user taps outside of the popover window or you explicitly dismiss it.

Material Design guidelines don't specify popovers, but the specification of material properties provide a clear set of properties that can be used to create popups.