The following description comes from Wikipedia:
RSS is a family of Web feed formats used to publish frequently updated content such as blog entries, news headlines or podcasts. An RSS document, which is called a "feed," "web feed," or "channel," contains either a summary of content from an associated web site or the full text. RSS makes it possible for people to keep up with their favorite web sites in an automated manner that's easier than checking them manually.
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 initiates the subscription process. The reader checks the user's subscribed feeds regularly for new content, downloading any updates that it finds.
Basically, this is a great way to be notified when the BNR Metal Pages have been updated, without having to manually check the site. Personally, I use Bloglines for my RSS reading, and can't live without it.
To subscribe to the BNR Metal Pages RSS feed, add the following URL to your RSS reader:
