Zero-knowledge proof is a technology in privacy and blockchain technology in which the prover demonstrates knowledge of data while the verifier asserts the validity of the information without knowing anything about what has been verified.
Zero-knowledge proof applies to the use of cryptographic applications that ensure information safety. The user logs on to an application supplying sensitive details like the password without fear of interception or theft by a third party who would approve such a form.
The use of Zero-knowledge proofs is to prove that a secret-based action is correct while keeping the secrets hidden.
Zk-Proof is also known as a Zk protocol and is a prominent feature of privacy-focused blockchains like Zcash.