Gaze tracking is a technology that measures where a person is looking, often using cameras and sensors. It can determine the direction of a person's gaze and the specific point of focus, which is useful in various fields such as psychology, marketing, and human-computer interaction. This technology can be applied in devices like virtual reality headsets and assistive technologies for individuals with disabilities. By understanding gaze patterns, researchers can gain insights into attention and engagement, making it a valuable tool for improving user experiences in applications like video games and advertising.