RSS is a family of web feed formats used to publish frequently updated content like blog posts, news headlines, or podcasts. RSS feeds allow users to stay up to date with their favorite websites more easily than manually checking each site. Users subscribe to RSS feeds by adding the feed's link to an RSS reader, which then regularly checks for and downloads any new content updates. Sharing content to blogs and other websites is known as syndication. RSS and Atom are common feed formats that are based on XML.