hh on Nostr: Where's "here" though? The "social media" apps like Coracle (the client I'm using ...

Where's "here" though? The "social media" apps like Coracle (the client I'm using right noon desktop), Nostur, Damus, Amethyst, etc? Artists and creators could be on Nostr via Wavlake, Zapstream, etc., and not "here".