I believe the main one right now is digital identities. https://www.w3.org/reports/identity-web-impact/ https://www.w3.org/reports/identity-web-impact/ Classic

I believe the main one right now is digital identities. https://www.w3.org/reports/identity-web-impact/ https://www.w3.org/reports/identity-web-impact/ Classic use cases would be like 1) show that you have a national id (like a passport) without revealing which one, 2) show that you are >= 18 without revealing your date of birth. More generally, assuming you have digital credentials with metadata, pretty much any statement can be proved in ZK (relatively efficiently, especially if the digital id is designed to be ZK friendly).