What's a podcast?

A podcast is a series of digital media files that are released episodically and often downloaded through web syndication. How to use a podcast:
1. Create audio or video that you want to share (usually MP3 or MP4)
2. Upload the file to a server
3. Link to the file in a post in your weblog
4. WordPress automatically Includes a link to the file in your RSS/Atom feed
5. Listeners "subscribe" with podcast client application to your RSS/Atom feed and download new files automatically.