So suppose you are a university lecturer and you decide that you are going to record all your lectures by video or audio. You may then post your podcasts on your site. How are you going to get your podcasts to everyone who needs to hear or see them? Well, you need an RSS feed.(as mentioned yesterday some code in a file that describes the content of your website so that people out there can "subscribe" or register an interest in it.)

Using a free desktop or web based aggregator(software for registering your interest and subscribing to a list of feeds in your interest area)Your students will subscribe to your RSS feed. They will then be notified everytime you upload something to your site and will be able to download the latest lectures to their computers.

RSS can have lots of uses from pulling in traffic to your site, to sending automated newsletters. This is a whole topic in itself which I will cover in detail in layman's terms and post back here later - for now I need to dip into pod, web and broadcasting.