Podcasting has become very popular in the last couple of years. Right now, there are thousands of podcasts available on the web, touching upon any topic or niche imaginable. Basically, a podcast is like a radio show or program, but run on the internet entirely. Under the hood, however, a podcast is just an audio recording. It can be episodic or serial, depending on your preference and the way you want to have it made. The main idea with podcasts is that people can subscribe to them and they are notified whenever a new episode is available. Basically, your subscribers, instead of reading your posts on their computers, can listen to your content through their headphones at any time.
Adding a podcast to your WordPress blog is rather easy. From a technical point of view, the "subscription" mechanism of a podcast is handled by Really Simple Syndication (RSS) feeds...
