#CryptoFees101 Quick definition A network (transaction) fee is a small incentive paid to the computers that write your transaction into a blockchain block. No fee ⇒ low priority (or outright rejection).

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1️⃣ Why do fees exist?

Network Role of the fee

Bitcoin Rewards miners for validating & securing the network; deters spam.

Ethereum & EVM chains Pays for the gas (computational steps + storage) each smart-contract call uses.

Layer-2s / Rollups Covers rollup operator costs plus the tiny amount of L1 data they post for security.

“Feeless” chains (e.g. Nano, IOTA) Subsidise infrastructure or shift costs to inflation/validators—but someone is always footing the bill.