What is RSS?
RSS (Really Simple Syndication) is a family of data formats used to publish frequently updated content such as news headlines. An RSS document, which is called a "feed," "web feed," or "channel," contains either a summary of content from an associated web site or the full text. RSS makes it possible for people to keep up with their favorite web sites in an automated manner, that's easier than checking them manually.
How to use?
RSS content can be read by most modern web browsers or by installing and using software called an "RSS reader", "feed reader" or an "aggregator". The user subscribes to a feed by entering the feed's link into the reader or by clicking on the RSS icon in the browser that initiates the subscription process. RSS reader checks the user's subscribed feeds regularly for new content, downloading any updates that it finds.