What an RSS feed is, and why you would want one
An RSS feed is a machine-readable list of everything a site has published,
newest first. Point a feed reader at the URL and new articles arrive on their
own, with no algorithm deciding what you see and no email address handed over.
It is the oldest way to follow a site and still the most reliable.
If you have never used one, the readers people stick with are Feedly,
Inoreader, NetNewsWire on Apple platforms, and Thunderbird if you already live
in an email client. Paste either feed URL above into any of them.
Automation, bots, and newsletters
Both feeds work as triggers in Zapier, Make, and IFTTT, which is how most
people pipe a feed into Discord, Slack, or a newsletter. Most Discord RSS bots
take the URL directly. The rankings feed is the more interesting one to
automate: an item lands when the board is rebuilt, so a channel can be told
what moved overnight without anyone opening a page.
Terms, in one paragraph
Use any of it. Read the articles in a reader, aggregate the headlines, build a
tool on the rankings, ship it commercially. The only ask is attribution to The
GNG with a working link, and that the rankings are not presented as someone
else's work. If a feed breaks or the API is missing a field you need, say so
and it will get looked at.