What is zkSync? How to Use zkSync Explained in the Simplest Way?The network has received a lot of attention as a result of the Ethereum blockchain, the rapid growth of decentralized finance (DeFi) smart contracts, and the acceptance of nonfungible tokens (NFTs). Despite their high value, DeFi and NFTs consume a lot of energy throughout each transaction. Proof-of-work (PoW) consensus, which is used by Ethereum, was once very popular. Then, how to use zkSync easily?