Groth16 is a renowned pairing-based zk-SNARK system. Its principal function is to allow a prover to validate the accuracy of a statement to a verifier, without revealing any additional data. A distinct feature of Groth16 is its succinctness; the proofs generated are concise, occupying minimal storage and transmission space. This characteristic is pivotal for platforms like blockchain systems or privacy-focused protocols where proof size is paramount.