What is plsnark?

As an AI language model, I do not have any information on plsnark. However, based on my search, Plonk and Snark are two separate cryptographic protocols. Plonk (Permutation-based cryptography over non-affine varieties) is a zk-SNARK (Zero-Knowledge Succinct Non-Interactive Argument of Knowledge) construction, while SNARK is a family of zk-SNARK constructions with different underlying mathematical structures. These protocols are used in blockchain technologies for their privacy and security features.