check this website you will find information about rss. http://communityseo.com/forums/The-Importance-RSS-t150.html
rss it one of the important part of seo. each an every site should have rss. After making rss need to submit in rss directories, also there is rss subscription. As rss stands for "really simple syndication" If any changes made in your sites it gets replecfted in rss. So rss helps to keep updated.
RSS is another communication channel with potential customers, it has the extended benefit for syndication which can increase your audience. Just as you can search optimize your website you can also search optimize an RSS feed. There are a number of RSS educational articles and videos at http://www.feedforall.com/rss-education-center.htm