RSS (Really Simple Syndication or Rich Site Summary) is a format for delivering Web content. RSS news feeds allow you to see when websites have added new content. An RSS news aggregator, or reader, will download and display RSS feeds for you, giving you the latest headlines, summaries, links to full stories, and video from your selected sites in one place, as soon as it is published, without having to visit the sites. A number of free and commercial news aggregators are available for download. Many aggregators are separate, stand-alone programs; other services will let you add RSS feeds to a Web page.