Why Nostr? What is Njump?

Public Key
npub1p0nd08gmpaj9hm8q6cq0f3l56fyk2mkv9k05thug2vha4zpkz3ssd28ka5
Profile Code
nprofile1qqsqhekhn5ds7ezmansdvq85cl6dyjt9dmxzm869m7y9xt763qmpgcgfs738y
Author Public Key
npub1p0nd08gmpaj9hm8q6cq0f3l56fyk2mkv9k05thug2vha4zpkz3ssd28ka5