Q. What is a podcast?

A podcast is essentially a digital radio show. You can interview guests, talk about current events, and dig out your own niche topic. Podcast files can be stored online to stream or can be made available to download through a variety of programs. 

Here's another explanation: "Podcasts are episodes of a program available on the Internet. Podcasts are usually original audio or video recordings, but can also be recorded broadcasts of a television or radio program, a lecture, a performance, or other event. 

Podcasts usually offer each episode in the same file format, such as audio or video, so that subscribers can enjoy the program the same way each time. Some podcasts, such as language courses, include multiple file formats, such as video and documents, to teach more effectively. 

For podcast listeners, podcasts are a way to enjoy great content from around the world for free. For podcast publishers, podcasts are a great way to reach a wide audience."

Source: "For Podcast Fans: Frequently Asked Questions." Apple.com. Retrieved 7/12/2016.

See Butler's Podcasting LibGuide to learn more.