Podcasts are audio or video files that can be listened to or viewed on demand through subscription feeds (RSS) and automatically downloaded to a computer or mobile device. They are created using free or inexpensive software and can take various forms like audio-only, video, or screencasts. Podcasts allow for added learning value by providing additional materials to enrich the learning experience beyond lectures. Students report finding podcasts useful for productive listening during commutes or when preparing for assignments.