RSS is an alternative view of a web page that allows you to subscribe and read the content in RSS newsreader software. Whenever the web page is updated your newsreader will automatically display the new item.
There are many news readers available and many are free. Some news readers are programs you download and install on your computer and others are web-based services that you access with your web browser.
To subscribe to an RSS feed, right-click on the feed name and select "Copy Shortcut" or "Copy Link Location" to copy the location URL and then paste it into the appropriate place in your RSS reader. Follow the instructions for your particular news reader. Or, left click on the link and follow the instructions generated by your browser.