Global feed is posts from all of the relays that you use, minus the people you follow. Those people show up under the Follows feed.
Discussion
Ok, so no need to specify when I post a note. That’s just a feed management tool.
If I am following someone, do I see what they post regardless of the relay I’m on?
Not an expert, but I think your relay needs to talk to a relay they are connected to or you won’t see them. But I suspect it’s like lightning, once your connected to enough, you’ll eventually see everything without having to be connected to every relay. Not sure.
Relays cannot communicate with each other, only to clients AFAIK.
I too would like to know this… I would guess you would need to have set the same relay that they post to.