PAGING BACK three years, we ask the question, "What is RSS?" RSS, short for Really Simple Syndication, lets you receive instant information updates. With RSS webfeeds you are in control — you decide what you want to read and when you want to read it. A simple news reader makes this possible. You can make the readers work with your email clients or on your mobile phone. It's really easy to do.
Once you subscribe to a site's RSS webfeed or even a search engine feed, your news reader goes out and grabs the updated information saving you the time it takes to visit each site. The latest information as soon as it is published comes to your news reader. One of the easiest to use is the Google Reader.
Major news sites, blogs, and a growing number of corporate websites publish their content as RSS webfeeds. Millions of sites such as BBC World News, The New York Times, and EasyDeltaV.com use RSS to deliver headlines and summaries.
Some browsers like Firefox automatically check for webfeeds when you visit a website, and display this icon when it finds one. This auto discovery will be in the next Internet Explorer and Microsoft Office releases.
RSS Starter Kit -- "Why use RSS?"