What is a podcast?

Podcasts are digital media files that can be listened to on portable audio devices and computers. Despite the wide variety of content and storytelling styles represented within the podcast industry, the format is relatively simple: a piece of audio that you can listen to on demand. There are also video podcasts, but the majority are audio only.
Podcasts can be downloaded or, on some applications, streamed. Podcasts are structured from an RSS feed with an audio enclosure; there are also RSS feeds that are not podcasts and do not contain audio.
The name podcast is derived from “iPod” and “broadcast,” referencing one of the earlier Apple digital media players used to listen.