RSS stands for Really Simple Syndication. Instead of boring you with the gritty details (belive me, there are plenty of other places to get all that), let me give you the simple explanation.
RSS allows for others to grab your syndication, or ‘feed,’ so as to keep up with a blog or news site without needing to remember to go to the site specifically. The feed itself is really kinda useless without a feed reader though.
Feed Reader
In order to make use of an RSS feed, you need a feed reader. A reader will allow you to keep track of multiple feeds from one location, allowing you to see what’s going on with your favorite sites all the time. Personally, I make use of Netvibes, but you can also make use of iGoogle or any other number of RSS Readers.
How To
Once you have decided on a reader, you are ready to start grabbing feeds. Believe it or not, pretty much every site that you already visit likely has a feed. You can normally tell by the standard RSS Button:
If you click on my RSS Button, you see the following page:
To the right, you can see a list of common reader that you may use to grab my feed. If your feed isn’t listed, you can also copy and past the URL from your browser’s navigation bar into a reader of your choice.
Once that’s done, you can look at your reader to see a list of post titles for my blog, click on the desired post title, and continue reading the best SEO blog ever. Now, susbscribe to my feed.