Is there a tl;dr on the crdt/collaboration feature? How does one get the share up and running, do you get a special link that you can send to someone? How smoot

Is there a tl;dr on the crdt/collaboration feature? How does one get the share up and running, do you get a special link that you can send to someone? How smooth can it get? I'm guessing it's hard to do without some sort of relay system (like syncthing) or servers for hosting links (like https://file.pizza https://file.pizza )