Ether (ETH)

ETH is the cryptocurrency used to interact with the Ethereum network. It's used to pay for transaction fees (called gas fees) and to power smart contracts. 

Key Functions of Ether:

Transaction Fees: ETH is used to pay for the computational work required to execute transactions on the Ethereum blockchain. 

Smart Contract Fuel: It's the fuel that allows smart contracts to run and execute. 

Digital Asset: ETH is also traded as a digital asset, and its price fluctuates like other cryptocurrencies. 

Payment Method: Some businesses accept ETH as payment for goods and services.