@rysiek @axbom I use #StarTrek to explain it: #Fediverse is the Federation of aligned worlds.
#Mastodon is Earth, #Misskey is Vulcan, #Pixelfed is Centauri Prime & #Pleroma is Bajor.
There are many worlds & each server is like a starship or space station from that world.
#ActivityPub is the universal translator that connects them all.
#Twitter is the Klingon Empire, while #Facebook is the Borg.