RSS (Really Simple Syndication) is an XML format used to distribute and aggregate website content. With an RSS subscription and reader you can see real-time updates of content without having to visit specific websites.
☉ How to subscribe to RSS Feeds?
You can view the feeds with an RSS reader or aggregator. Some browsers, such as the current versions of Firefox and Safari have built in RSS readers. If you're using a browser that doesn't currently support RSS, there are a variety of RSS readers available on the web; some are free to download and others are available for purchase.