zkEVM, short for Zero-Knowledge Ethereum Virtual Machine, is a layer-2 scaling solution compatible with Ethereum infrastructure. It executes smart contract transactions using zero-knowledge-proof computations, increasing throughput and reducing costs. zkEVM replicates the Ethereum environment in a highly scalable and secure layer 2, allowing seamless transition for developers and existing applications. It offers various types tailored to different needs, with Nadcab Labs providing support for adoption. Overall, zkEVM enhances Ethereum's scalability and accessibility while maintaining security.