#eth Ethereum (ETH) is a decentralized blockchain platform that enables smart contracts and decentralized applications (DApps). Launched in 2015 by Vitalik Buterin, it is the second-largest cryptocurrency by market capitalization. Ethereum's native cryptocurrency, Ether (ETH), is used for transactions and to power applications on the network. Its unique feature is the ability to execute programmable contracts, known as smart contracts, which operate without downtime, fraud, or third-party interference. Ethereum transitioned to a more energy-efficient proof-of-stake consensus mechanism in 2022, known as Ethereum 2.0. It plays a crucial role in decentralized finance (DeFi), NFTs, and other Web3 innovations.