Why Nostr? What is Njump?

Public Key
npub19m2wgkdr48hplde6q3yckjh5vkdzx80aue3c2nvykexr4r5ypn0qf2t2j7
NIP-57 Address
violetbird2@primal.net
Profile Code
nprofile1qqsza48ytx36nmslkuaqgjvtft6xtx3rrh77vcu9fkztvnp636zqehs63djgz
Author Public Key
npub19m2wgkdr48hplde6q3yckjh5vkdzx80aue3c2nvykexr4r5ypn0qf2t2j7