Elevation UI is a critical design principle that helps indicate the importance or interactivity of elements. By using shadows, gradients, or other visual cues, elevation in UI design helps users distinguish between components at different layers, improving usability and clarity.

This technique is often used in modern design systems like Material Design, where elements like cards, buttons, and menus use varying degrees of elevation to indicate their functionality. Higher elevation suggests that an element is more prominent or interactive, such as a floating button or modal, while lower elevation elements remain in the background.

By applying elevation UI design thoughtfully, designers can guide user interactions, ensure a clean visual hierarchy, and enhance the overall user experience.