Gas / Gas Fee

When you send a transaction on a blockchain like Ethereum, you are not just moving tokens from one address to another — you are asking a network of thousands of computers around the world to process, verify, and permanently record that action. That work takes computational effort, and the people running those computers need an incentive to do it. That incentive comes in the form of a gas fee: a small payment you attach to your transaction to compensate the network for the work it performs on your behalf.

The word “gas” is a deliberate metaphor. Just like a car needs fuel to run its engine, a blockchain transaction needs gas to power its execution. More complex transactions — like interacting with a sophisticated decentralized application — require more gas, just as a heavy truck burns more fuel than a compact car on the same trip. Gas fees fluctuate constantly based on how busy the network is. When many people are trying to transact at the same time, they effectively bid against each other for space in the next block, and fees rise. When the network is quiet, fees fall.

Example: Think of gas fees like surge pricing on a ride-hailing app. Sending a transaction on a calm Sunday morning might cost a fraction of a cent, but during a major NFT launch or a market crash — when everyone is rushing to transact simultaneously — that same transaction could cost several dollars or more.