RSS solves a problem for people who regularly use the web. It allows you to easily stay informed by retrieving the latest content from the sites you are interested in. You save time by not needing to visit each site individually. You ensure your privacy, by not needing to join each site's email newsletter. 

There are disadvantages to using your browser, too, probably the most serious of which is that if you use more than one computer to access the Internet, you have no good way to synchronize your RSS feeds. If you take 15 minutes at lunch to catch up on the latest headlines at your desk, later on you'll be seeing some of the same headlines on your home computer.