Eye tracking is a technology that measures where a person is looking. It uses special cameras and sensors to detect the movement of the eyes and determine the focus of attention. This information can be used in various fields, including psychology, marketing, and user experience design. By analyzing eye movement, researchers can understand how people interact with visual information. For example, advertisers can see which parts of an ad attract the most attention, while scientists can study how people process visual stimuli. Overall, eye tracking provides valuable insights into human behavior and perception.