Ethereum Gas

Gas is the internal pricing for running a transaction or contract in Ethereum. It's purpose is to decouple the unit of Ether (ETH) and its market value from the unit to measure computational use (gas).

Ethereum miners are free to ignore transactions whose gas price limit is too low.¹

[1] https://www.cryptocompare.com/coins/guides/what-is-the-gas-in-ethereum/