What is Nostr?

Public Key
npub1kwclphjh6kd0skuv0kc3lrvej2zzeukqvju2dt0zv07yawdjelpsk7ww7a
Profile Code
nprofile1qqst8v0smetatxhctwx8mvgl3kve9ppv7tqxfw9x4h3x8lzwhxevlsc5zz7l6
Author Public Key
npub1kwclphjh6kd0skuv0kc3lrvej2zzeukqvju2dt0zv07yawdjelpsk7ww7a