Podcasts are digital audio or video files that can be downloaded and listened to on computers or mobile devices like iPods. They allow users to subscribe to a feed of new content from a particular podcast and have new episodes automatically downloaded. Podcasts provide an engaging way for students to learn through creating and sharing their own audio or video content on various topics. Teachers can also create podcasts to deliver lessons, assignments, and other educational materials to students. The document provides examples of how students and teachers can use podcasts in education.