Does it mean that each communities like this fediverse for example is different from another community with the same name in a different instance?
Does it mean that each communities like this fediverse for example is different from another community with the same name in a different instance?
Yes, tho communities with the same name don’t actually have the same name, because the name of the server is included.
That is, for example, this Fediverse on lemmy.world is actually Fediverse@lemmy.world while Fediverse on lemmy.ml is Fediverse@lemmy.ml.
If your account is on lemmy.world you just don’t see the @lemmy.world part because the server hides it for you, it does exist anyway.