Haha that's alright.. I was also confused and wondering since when did ublock origin start providing dns and that's the only reason I bothered to open the link.
Actually, they named it wrong.. Its not unlock origin its uBlockDNS their website even mentions that they are not related to ublock origin lol.
All you had to was click and open the website (;
It stands for Free Media Heck Yeah.. Basically a curated list of websites for all kind of free media providers, vpn providers, various known tools to improve quality of life and such and so on.. It also has a decent Beginner guide