RSS stands for Really Simple Syndication. These are also sometimes called "Web Feeds" "RSS Channels" and "RSS Readers" which is a content delivery system. It is the format used when you want to syndicate news and other web content. When it distributes the content, it is called a feed.
RSS Reader also act as newspaper. Most people are interested in many websites whose content changes on an unpredictable schedule. Examples of such websites are news sites, community and religious organization information pages, product information pages, medical websites, and weblogs. Repeatedly checking each website to see if there is any new content can be very tedious.
RSS Reader is a better way to be notified about new and changed content. Notifications of changes of multiple websites are handled easily, and the results are presented to users in a well organized and distinct form.