A tooltip is a small informative text box that is represented by a small icon. It opens up and provides the reader with the needed information when the user hovers and clicks on it. They are used to provide extra information, an extra tip, or some understanding to the user without cluttering the page design.
Tooltips provide the information that the users may look for, and this keeps the user engaged with the site. It helps the user navigate and perform the next desired task on the site, and this makes the user's journey easy. With valuable tooltips, the users do not drop off midway.