Apply tooltips mindfully

Good design should be self-explanatory. If an element already contains a descriptive label, then there's no reason to duplicate this information in a tooltip. For instance, if a button is labeled "Submit," there's no need for a tooltip stating "Click to submit." The label itself conveys the action, and adding redundant information in a tooltip may clutter the interface.

Also, keep in mind that tooltips are user-triggered and will not appear unless users interact with the elements that they are attached to, so avoid placing any information in the tooltips that are vital to the task flow. ^[1]