Stop motion is an animation technique that captures still images frame by frame and shares a story with the audience. In this technique, a camera is started and stopped frequently, frame-by-frame, to give motionless objects and figures the illusion of movement.
On the other hand, slow motion is a filmmaking technique in which the speed of the video slows down than its original speed. La Voyage Dans la Lune (1902) was the first-ever movie that used this technique to move moon inhabitants in a weightless fashion.
Fast motion is the opposite of the slow-motion technique in which a video appears faster on the screen. This technique allows the audience to watch a scene with great speed that would normally take a long time to happen. Moreover, this video technique helps the audience to avoid boringness when watching a long scene.