RSS—or Really Simple Syndication—represents a kind of data flow that is common on the web today. Its essentially a way to feed published works like news headlines, blog posts, audio, and video into a standardized, easily accessible format.
Publishers (anyone with content to share) can use RSS to syndicate their content automatically. Readers (anyone looking for content) can subscribe to RSS feeds online, and use RSS Reader or feed reader software to gather all of the content they choose into one place.
An RSS feed simply takes created content and automatically delivers it in a standard format to people whove subscribed to receive it. These feeds are free and have helped to expand the reach of web content worldwide.