RSS content can be read using software called an "RSS reader," "feed reader" or an "aggregator." The user subscribes to a feed by entering the feed's link into the reader or by clicking an RSS icon in a browser that begins the subscription process. The reader checks the user's subscribed feeds often for new content, downloading any updates that it finds. This content is stored in an standard XML file that many different computers and programs can understand. This file tells the programs how to show the content to the user.