What is Ethereum?
Ethereum is a public blockchain launched in 2015 that introduced general-purpose smart contracts. Its native currency is Ether (ETH), and its execution environment is the Ethereum Virtual Machine (EVM). Ethereum transitioned from Proof of Work to Proof of Stake in 2022.
Why Ethereum matters
Understanding Ethereum is part of building a solid mental model of how Bitcoin, blockchain and Web3 systems actually work. Concepts in the Ethereum category sit at the foundation of the broader stack — get them right and the rest is far easier.
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Related terms
- Smart Contract — Code on a blockchain that automatically enforces its rules.
- Solidity — The most popular programming language for Ethereum smart contracts.
- EVM (Ethereum Virtual Machine) — The execution environment for Ethereum smart contracts.
- Proof of Stake — A consensus mechanism where validators stake capital instead of burning energy.
More ethereum terms
- DeFi (Decentralized Finance) — Financial services built from smart contracts.
- Gas — The unit measuring computational cost on Ethereum.
- NFT (Non-Fungible Token) — A unique, non-interchangeable token on a blockchain.
- Web3 — An umbrella term for blockchain-based, user-owned internet applications.
- DAO (Decentralized Autonomous Organization) — An on-chain organization governed by token holders.
- dApp (Decentralized Application) — An app whose backend lives on a blockchain.
- DEX (Decentralized Exchange) — A smart-contract-based trading protocol.
- AMM (Automated Market Maker) — A pricing formula that replaces order books.
Keep exploring
Continue with the full blockchain glossary — 136 terms in total — or read the developer blog and FAQ for deeper context.