Stop-motion animation involves taking still photographs of objects moved in small increments to create the illusion of movement when viewed as a continuous sequence. The document discusses an upcoming student project to create stop-motion videos using the iMotion app. It outlines the steps of brainstorming and developing a story, building props and sets, shooting the movie by taking incremental photos, and sharing the final video. Tips are provided such as keeping the story and movements simple, using quality backgrounds, and taking a sufficient number of frames to make the animation smooth.