I know have RSS Feeds set up for my blog.
I didn’t really understand them much until today, but here is what they are.
RSS Feeds send titles and links to another program of my site so they can see if its been updated without having to come to the site or to see if there is anything interesting. A great example of this is www.netvibes.com, all those links on certain blog sites are RSS feeds, so now if someone uses a site such as www.netvibes.com they could add me to their blog list or their news headlines. I realize that this is only for the hardcore bloggers, but its fun so i did it. The links are on the right sidebar.