#GasFeeImpact These fees compensate for the computational resources required to execute and verify transactions or smart contracts. Gas fees fluctuate based on network congestion, transaction complexity, and the amount of activity on the blockchain. High demand often leads to higher gas fees, while periods of lower demand result in lower fees. In Ethereum, gas is measured in "Gwei," a subunit of Ether (ETH). Managing gas fees is essential for optimizing costs, especially in decentralized finance (DeFi) and NFT transactions.