RSS, which stands for Really Simple Syndication, allows Web site content to be distributed easily and automatically to subscribers as soon as the content is published. This helps alert users to your fresh content, while simultaneously promoting your site to search engines. When someone subscribes to your RSS feed, they copy that page’s URL into a feed reader, which lets subscribers easily view excerpts or full articles you’ve published on your site. RSS feeds are free, and all major blogging software comes with the capability to publish a feed.
For more on RSS feeds, be sure to read RSS Tools and Resources.