The ability to cryptographically sign new events  with your secret private key under your unique nostr identity - npub...... 

 I should post my secret npub into my profile? 

 🦂 

 It's not really verification of identity or status, since there is no actual verification occuring and they can be obtained for free at little effort. Effectively it's a kind of vanity badge that may or may not tell others about you or a website that you are associated with 🙂 

 Thanks!