What Is Ethereum?
In plain English
Ethereum is a decentralized, open-source blockchain platform launched in 2015 by Vitalik Buterin. Unlike Bitcoin, which primarily serves as digital money, Ethereum is a programmable blockchain that supports smart contracts and decentralized applications. Its native token, Ether (ETH), is used to pay transaction fees and computational costs on the network.
How Is Ethereum Different From Bitcoin?
While Bitcoin focuses on being a store of value and payment network, Ethereum is designed as a programmable platform. Developers can build applications on Ethereum using smart contracts — self-executing code that runs exactly as programmed. This enables DeFi protocols, NFT marketplaces, DAOs, and thousands of other applications that would be difficult or impossible on Bitcoin's more limited scripting language.
What Is Ethereum's Proof of Stake System?
Ethereum transitioned from proof-of-work to proof-of-stake in September 2022 ("The Merge"), reducing energy consumption by over 99%. Validators now stake 32 ETH as collateral to propose and verify blocks. This system rewards honest validators with ETH and penalizes malicious behavior by slashing staked funds. Proof of stake makes Ethereum more energy-efficient and accessible to participants.
What Are Ethereum Gas Fees?
Every transaction on Ethereum requires a fee called gas, paid in ETH. Gas compensates validators for processing and securing transactions. Fees fluctuate based on network demand — during peak usage, gas fees can spike significantly. Layer-2 solutions like Arbitrum and Optimism process transactions off the main chain to reduce costs while inheriting Ethereum's security guarantees.
Frequently asked questions
Is Ether the same as Ethereum?
No. Ethereum is the blockchain platform, while Ether (ETH) is the native cryptocurrency used on that platform. People commonly say 'Ethereum' when referring to the token, but technically Ether is the currency and Ethereum is the network.
Can Ethereum be used for more than cryptocurrency?
Yes. Ethereum powers decentralized finance (DeFi), NFTs, supply chain tracking, identity verification, voting systems, and more. Any application that benefits from transparent, tamper-proof logic can potentially run on Ethereum's smart contract platform.
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Related terms
Bitcoin
Bitcoin is the first and most widely recognized cryptocurrency, created in 2009 as a decentralized digital currency that operates without a central bank or single administrator.
Smart Contract
A smart contract is a self-executing program stored on a blockchain that automatically enforces the terms of an agreement when predetermined conditions are met.
Gas Fees
Gas fees are transaction costs paid to blockchain validators for processing and confirming transactions on networks like Ethereum.
DeFi (Decentralized Finance)
DeFi refers to financial services built on blockchain technology that operate without traditional intermediaries like banks, brokers, or exchanges.
Staking
Staking is the process of locking up cryptocurrency to help secure a proof-of-stake blockchain network, earning rewards in return.