$ETH Ethereum (ETH) is a decentralized blockchain platform that allows developers to build and deploy smart contracts and decentralized applications (dApps). Its native cryptocurrency, Ether (ETH), is used to pay for transactions, smart contract execution, and other services on the Ethereum network.

Ethereum introduced the concept of smart contracts, which are self-executing agreements with terms directly written into code. It's widely used in DeFi (Decentralized Finance), NFTs (Non-Fungible Tokens), and other blockchain-based innovations.

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