RSS 101
Rich Site Summary, or more popularly known as RSS, is a form of Web content delivery system. Most news websites, blogs and others syndicate their ever changing content as an RSS Feed to subscribers.
RSS keeps users up-to-date by collecting the most recent content from the subscribed sites. It is a big time-saver because the user does not have to visit that particular site each time. It also ensures the user’s privacy because subscription to the site’s newsletter would not be necessary.
A feed reader is a software that gets RSS feeds from sites and generates a display for easy reading. Popular RSS readers include FeedReader, NewsGator, My Yahoo, Google Reader, Bloglines and Amphetadesk.
More information on RSS at WhatIsRSS.
Image source: FTPB