What is RSS
RSS stands for "Really Simple Syndication" or "Rich Site Summary." It is a format for delivering frequently changing web content. Many news-related sites [Google News, Yahoo News and most newspapers], weblogs [blogs] and other online publishers syndicate their content as an RSS Feed to simplify communications with their audiences.
Any time you see the symbol above, that indicates that the information on that page is available as an RSS feed that you can subscribe to. Check out "RSS in Plain English" to get a better understanding.
Why should I be using RSS?
RSS solves a significant problem for people who regularly use the web: time. RSS allows you to easily stay informed, by automatically retrieving the latest content from the sites you are interested in.
You save time, because with RSS you no longer need to visit each individual site. Instead, a kind of program called an RSS Reader does it for you at regular intervals, alerting you when there's something new.
There's also the added benefit of greater privacy. You don't need to give your email address in order to get the content and updates you want.
Where can I get an RSS Reader?
This video gives you a few options. Also, here is a list links to popular rss readers: