$ETH Ethereum (ETH) is a decentralized blockchain platform that supports smart contracts and decentralized applications (dApps). Introduced in 2015 by Vitalik Buterin and a team of developers, Ethereum allows programmers to create and run code on a global network without needing a central authority. Its digital currency, Ether (ETH), powers transactions and activities within the network. Ethereum opened the door to more advanced blockchain use, going beyond simple value transfers. With the shift to Ethereum 2.0, it now uses a proof-of-stake system, which makes it more energy-efficient and scalable. Ethereum plays a major role in DeFi, NFTs, and Web3 development.