I just found a great definition of podcasting on my church’s website:

“Podcasting uses the same audio files that we currently make available for download. The only difference is that you don’t have to visit the site each week to get the current audio message. Instead you can use a podcast aggregator (application) to subscribe to a free feed of our weekly messages. The aggregator software monitors the feed, and automatically knows when a new message is available to download.”

Read more here at http://www.questcommunity.com/we/podcast.shtml.