In simple terms an RSS feed is a set of automatically updating bookmarks. (A book mark is what you create when you save a website location to your favourites) A good example is the BBC News RSS feed. In Internet Explorer (Only supported from IE7 and later) when you subscribe to an RSS Feed it creates a link in the feeds section of your favourites. You click on it and it takes you to a page of links about the top stories. Firefox supports them much better, it displays them in a folder on the Bookmarks menu or even on the bookmarks toolbar if you wish. You hover over the folder and it expands with all the links in. Worth noting that Firefox comes with the BBC news RSS feed in the bookmarks toolbar out of the box, calls it recent news or similar, but it is the BBC RSS feed.