What is the purpose of a "tooltip" in digital displays?

The purpose of a "tooltip" in digital displays is to provide additional information on hover. Tooltips are small pop-up boxes that appear when a user hovers over an element, such as a button or icon. They are designed to give users contextual hints or explanations about what a certain function does or to offer more details that may not be immediately clear from the visual elements alone. This feature enhances user experience by making interfaces more informative and user-friendly, allowing individuals to understand functions without cluttering the design with excessive text.

The other options either misunderstand the tooltip's role or mischaracterize its function. While visually enhancing the interface can be a byproduct of well-designed tooltips, it is not their primary purpose. Similarly, tooltips are not merely decorative; they serve a functional role in aiding user comprehension. Lastly, tooltips do not replace traditional menus but rather complement them by providing additional context without disrupting the flow of interaction.