Gas is the resource needed to perform computations on the Ethereum Virtual Machine (EVM). These operations can involve simple ETH transfers as well as executing complex smart contracts.

When a user sends a transaction or interacts with a DeFi application, they must pay a fee (in the form of gas) to the network to compensate the miners who process the transaction and secure the network.

Gas is a key concept in the Ethereum blockchain, as it is used to incentivize miners to process transactions and to prevent the network from being overwhelmed by too many transactions.

The amount of gas required for a transaction or smart contract execution can vary depending on the complexity of the operation, so users must carefully consider the gas costs when using DeFi applications.

Overall, gas is a crucial part of the cryptocurrency and DeFi ecosystems, as it helps to ensure that the network is secure and transactions are processed efficiently.

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