RSS is a family of web feed formats used to publish frequently updated content.
An RSS document, which is called a 'feed', 'web feed' or 'channel'
contains either a summary of content from an associated website or the
full text. RSS makes it possible for people to keep up with their
favorite websites in an automated manner that's easier than checking
them manually.
RSS content can be read using software called a 'feed reader' or an 'aggregator'.
The user subscribes to a feed by entering the feed's link into the
reader or by clicking an RSS icon in a browser that initiates the
subscription process. The reader checks the user's subscribed feeds
regularly for new content, downloading any updates that it finds.