As far as I know one of RSS important feature is for the readers who want to subscribe to timely updates from favored websites from many sites into one place.It helps us save our valuable time by subscribing to a reader for a content that we are interested in it. Source: What is rss and the usefulness of it. Tips: Install Google desktop, submit DP rss feed. Google would send you the relevant info you want right to your desktop without you have to login to the forum.
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. The number of sites offering RSS feeds is growing rapidly and includes big names like Yahoo News.
It's not only for SEO, I also use it to get website update notification for the sites I'm interested with.