RSS stands for "Really Simple Syndication". RSS is a popular way to pull in news and information from across the Web. RSS allows web sites to easily push content to subscribers directly. Subscribers are instantly updated with the latest information and news from web servers.
Say you come across information you find important or interesting. A click or two and it now feeds directly to your My Yahoo!, My MSN, or My AOL page. This "feed" is information straight from the website delivering the latest possible news.