Social bookmarking is a great SEO tool for a number of reasons. The first is that it creates additional inbound links to your content, which is always a good way to gain the attention of search engine bots and increase your page ranking.
Secondly, social bookmarking and news aggregation sites are very popular, especially with the younger generation of internet-philes who are more comfortable receiving news from an online site than by watching television or reading the newspaper. Subscribing to an RSS feed for an aggregation site is a virtually effortless way to read about the latest topics of interest.
Thirdly, social bookmarking works to market your online business in a viral manner. That is, these sites encourage the sharing of content. Readers who enjoy your content will rate it highly and add it to their list of favourite bookmarks where others can view it and even comment.
RSS streamlines communication between publishers and readers. Since RSS has had a popularity surge, webmasters have been experimenting and using RSS feeds to deliver content in new and innovative ways. Typically, RSS feeds contain news headlines and content summaries. The content summaries contain just enough information without overwhelming the reader with superfluous details. If the reader is interested and wants additional information they can click on the item in the feed, accessing the website which contains additional details. RSS readers aggregate multiple feeds, making it easy for individuals to quickly scan information contained within each feed. Feeds are generally themed, allowing users to opt-in to feeds that are of interest.
The big benefit to RSS is that individuals opt-in to content of interest, totally controlling the flow of information that they receive. If the quality of the content in the feed declines, users simply remove the feed from their RSS reader and they will not receive any additional updates from that source. The RSS reader acts as an aggregator, allowing users to view and scan multiple content streams in a timely fashion.