What is Nostr?

Public Key
npub123l5twgure45zdu30n0ylgw6se7gehly858kgmyrdf3zw6tetg2qgre6t5
NIP-05 Address
vake@nostrplebs.com
Profile Code
nprofile1qqs9gl69hywpu66px7ghehj058dgvlyvmljr6rmydjpk5c38d9u459qlkjxrs
Author Public Key
npub123l5twgure45zdu30n0ylgw6se7gehly858kgmyrdf3zw6tetg2qgre6t5