An RSS badge shows you can subscribe to the RSS feed published. You can subscribe to this feed using a special application called a news aggregator. You will need a news aggregator to read the feeds.

News aggregators are software programs that enable you to view RSS feeds quickly and easily. A news aggregator, often hidden in your Windows taskbar, periodically checks each RSS channel to which you are subscribed to see if new news items have been published, and displays the results.

Some popular news aggregators include:

FeedDemon (http://www.feeddemon.com)
NewsGator (http://www.newsgator.com)