How eth gas works?

Short answer: Eth gas is the name for the unit of measurement used to calculate how much gas a given transaction requires on the Ethereum network. Long answer: The Ethereum network requires a certain amount of gas to process transactions. This gas is paid in ETH by the person sending the transaction. The amount of gas required varies depending on the complexity of the transaction. For example, a simple transaction might require only 10 units of eth gas, while a more complex transaction could require up to 200 units of eth gas.