What is Nostr?

Public Key
npub1p0nd08gmpaj9hm8q6cq0f3l56fyk2mkv9k05thug2vha4zpkz3ssd28ka5
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nprofile1qqsqhekhn5ds7ezmansdvq85cl6dyjt9dmxzm869m7y9xt763qmpgcgfs738y
Author Public Key
npub1p0nd08gmpaj9hm8q6cq0f3l56fyk2mkv9k05thug2vha4zpkz3ssd28ka5