A bit of general information on RSS feed:
There are millions of blogs on the internet. There are typically two ways to subscribe. One is via email and the other via RSS feed. (only 15% of readers online use the feed so far but it is a great tool)
If you would like to read your blog subscriptions via RSS feed you should open an account on: http://www.google.com/reader. After signing up, you will have a google reader account, then you can sign up to blogs either through the google reader (click add a subscription on the top right button) or by clicking subscribe via rss feed on your favorite blog sites.
Note the RSS feed link on this page right below the last comment. This orange symbol is typically how the link to register via RSS feed is posted.
Hope this helps!