Gas
Gas is the fee a blockchain charges to execute a transaction or contract call. Each operation costs a measured amount of "gas"; you pay it in the chain's n
Gas is the fee a blockchain charges to execute a transaction or contract call. Each operation costs a measured amount of “gas”; you pay it in the chain’s native token (ETH on Ethereum). Busy networks demand higher fees; simple transfers cost less than complex contract interactions.
Why it matters
Gas is the anti-spam lever that keeps the chain usable — every computation costs something, so nobody can flood it for free. When demand spikes (NFT drops, DeFi mania), gas spikes, pricing out small users. Layer-2 networks exist largely to make gas negligible.