What is a Feed?

A Web Feed simply gives you the ability to subscribe to our content with a tool known as a Feed Aggregator or Feed Reader. You can subscribe to our IDEAL Feed with your Feed Reader. Once you are subscribed to our feed, the latest content (blog updates, audio podcasts, video vodcasts) is delivered to you, helping you stay up to date with our content, and saving you the trouble of checking our site for new updates.

For more info Feedburner.com offers a good introduction to Feeds, Feedreaders, and content syndication.