We sign json messages and send them over websockets to multiple servers for storage. Clients can pull down these messages for viewing. You can build censorship-resistant social networks, reddit-style communities, blogging platforms, etc using this tech.
Discussion
How do I find different communities?
We love coffe. #coffechain
Not all clients support communities as of now.
If you are on Damus. I suggest following hashtags you like.
I'm using Amethyst and that seems to have hashtag following so I'll get hashing! Thanks.
If you like a reddit experience, try out Zapddit.com or Satellite.Earth.
Both have discovery functionality to discover communities. All is hooked and built on Nostr.