What is Nostr?

Public Key
npub155c00a6mvtuxquc83lgdsgcz2zxfyulvs3k3janw7s2p06uzqezqw6dfkh
NIP-05 Address
laura@nostrplebs.com
NIP-57 Address
rustturtle1@primal.net
Profile Code
nprofile1qqs22v8h7adk97rqwvrcl5xcyvp9pryjw0kggmgeweh0g9qhawpqv3qqs6w9e
Author Public Key
npub155c00a6mvtuxquc83lgdsgcz2zxfyulvs3k3janw7s2p06uzqezqw6dfkh