A heat map is a visualization tool in UX/UI design that graphically displays user behavior on digital interfaces like websites or apps. Using colors, it highlights areas of the page that receive the most views, clicks, or touches. Warm colors like red and yellow indicate high activity, while cooler colors like blue represent lower interaction. Heat maps provide valuable insights into which elements attract the most attention or are overlooked, helping designers optimize the placement of content and interactive elements. This enhances the user experience by strategically positioning key information and supporting intuitive navigation.