RSS stands for Rich Site Summary or Really Simple Syndication. It is a way to stay updated on information by receiving automatic updates from web content rather than having to visit websites. This video explains what RSS feeds do and why this technology is useful.
RSS feeds are available for many different websites including news, sports, entertainment, and education. Within the academic setting, bibliographic databases available at libraries provide RSS feeds so researchers can be alerted when new information is available about their specific research interests.
The standard RSS symbol looks as follows: 
Click on the symbol to access the feed URL, which can then be pasted into the "Add Feeds" section of a feed reader.