1. It gives you the latest updates.
Whether it is about the weather, new music, software upgrade, local news, or a new posting from a rarely-updated site you learn about the latest as soon as it comes out.
2. It saves on surfing time.
Since a RSS feed provides a summary of the related article, it saves the user's time by helping s/he decide on which items to prioritize when reading or browsing the net.
3. It gives the power of subscription to the user.
Users are given a free-hand on which websites to subscribe in their RSS aggregators which they can change at any time they decide differently.
4. It lessens the clutter in your inbox.
Although your email address will be required to enjoy the services of online RSS aggregators, RSS does not use your email address to send the updates.
5. It is spam free.
Unlike email subscriptions, RSS does not make use of your email address to send updates, thus your privacy is kept safe from spam mails