RSS (Really Simple Syndication) is an XML based web content syndication format used to deliver constantly updated headline feeds to readers. To subscribe to RSS feeds, you will need to use a "News Reader" or a "Feed Reader". News Readers or Feed Readers are available either online or may be downloaded as applications on your computer. Some browsers now also contain features that allow you to read RSS feeds. In some News Readers or Feed Readers you can simply drag and drop the orange RSS buttons. The reader checks your subscribed feeds regularly for new content and downloads any updates that it finds.