ETH is the native cryptocurrency of the Ethereum blockchain. It is a decentralized digital currency that enables peer-to-peer transactions on the Ethereum network. ETH is used to pay transaction fees and computational costs for running decentralized applications (DApps) on the Ethereum platform. ETH is also used as a store of value and a speculative investment asset, with its price fluctuating based on supply and demand on cryptocurrency exchanges. The Ethereum network is known for its smart contract functionality, which enables developers to build and deploy decentralized applications that can execute programmable logic on the blockchain.