Since it seems to be a common question for many new users.
Think of instances (lemmy.world, kbin.social, sh.itjust.works, etc.) like planets. Each planet contains cities (or
subredditscommunities). Most of these planets are federated meaning that if you were born on one planet (have a login) then you can travel and participate the galaxy of cities and planets. If a planet defederates, then you can no longer travel there if you were not from there.What is the difference between the All view and the Local view?
If I understand correctly, local only shows your planet and you can participate fully.
All shows the entire galactic federation (though you may only get to sightsee other planets, but not talk to the locals without getting a visa (login credentials for that planet))
Lemmy try