In blockchain, one of the most important mechanisms is "consensus." It ensures that all participants agree on the transaction records, determining the security of transactions, the operational efficiency of the blockchain, and the degree of decentralization.
The core part of the Ethereum blockchain system is EVM. In the past, when explaining the principles of blockchain operation (especially Bitcoin), the analogy of a "distributed ledger" was often used. However, Ethereum not only has the characteristics of a distributed ledger but also introduces smart contracts.