Why Nostr? What is Njump?

Public Key
npub1tqg0lzcj4jrhsv2ptar3v5a02zen95qn5tckd8qp4ut9dednactsj0tz4f
Profile Code
nprofile1qqs9sy8l3vf2epmcx9q473ck2wh4pvej6qf69utxnsq679jkuke7u9cew77l5
Author Public Key
npub1tqg0lzcj4jrhsv2ptar3v5a02zen95qn5tckd8qp4ut9dednactsj0tz4f