Ha. That's actually the main issue. Only developers know what "forking" is.

Basically a fork is when you make a complete copy of someone else's work (in this case a note) modify it slightly and republish it as your own.

It keeps the link back to the original note though so everyone can see where it came from

I can see how it might be useful for things like Wikipedia articles. But I don't know what's the point of having it on social posts