What Is RSS 2.0

RSS is a family of web feed formats used to publish frequently updated digital content, such as blogs, news feeds or podcasts.Users of RSS content use software programs called “feed readers” or “feed aggregators”. The user subscribes to a feed by entering a link to the feed into the reader program. The reader can then check the user’s subscribed feeds to see if any of those feeds have new content since the last time it checked, and if so, retrieve that content and present it to the user.

The initials “RSS” are variously used to refer to the following standards:

Really Simple Syndication (RSS 2.0)
Rich Site Summary (RSS 0.91, RSS 1.0)
RDF Site Summary (RSS 0.9 and 1.0)
RSS formats are specified in XML (a generic specification for data formats). RSS delivers its information as an XML file called an “RSS feed,” “webfeed,” “RSS stream,” or “RSS channel”.