Gas Fee
The cost you pay to execute a transaction on a blockchain network.
Explained Simply
Gas fees compensate network validators for processing your transaction. On Ethereum, gas is measured in 'gwei' (a tiny fraction of ETH) and varies with network congestion. During busy periods, fees can spike to $50+ for a simple transfer. Layer 2 networks like Base and Arbitrum dramatically reduce gas fees by processing transactions off the main chain. Different blockchains have very different fee structures.
Example
A simple ETH transfer might cost $2 in gas during normal conditions but $50+ during a popular NFT mint.
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