A podcast is an audio or video broadcast that is distributed over the Internet. It usually has a format similar to a radio or television show.
The Term “podcasting” is a combination of two words: IPod and broadcasting. It refers to the automatic downloading of MP3 audio files to a computer or MP3 player. It is not necessary to have the IPod brand itself. Podcasts can be used with many types of digital audio formats and played on any MP3 player or portable digital device.