Nostr is a protocol and there are many applications you can run on the protocol. Checkout https://nostrapps.com/ for some as an example.
If you attach a bitcoin wallet people can send you Sats, I use nostr:npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm on this Nostr social media a...