Optical Flow refers to the pattern of apparent motion of objects in a visual scene, caused by the relative movement between the observer and the scene. It is a crucial concept in computer vision and robotics, helping machines understand how objects move in their environment. By analyzing changes in pixel intensity over time, algorithms can estimate the direction and speed of moving objects. In practical applications, Optical Flow is used in various fields, including video compression, motion detection, and autonomous vehicles. It enables systems to track moving objects, stabilize video footage, and enhance navigation by providing real-time information about the surrounding environment.