RSS is a notification system used to alert subscribers to changes made to their favorite web sites, blogs, music sites, etc. The favorite site must offer this free service in order for people to add it to their lists. It is easy to discern that the site is RSS-enabled because of the orange rectangular button that is labeled with either RSS or XML somewhere on the page.

An RSS feed is a text-based headline with a link, and usually a short summary, that is shot over to you as soon as it leaves your favorite news site