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What Is Ethereum?
A practical introduction to Ethereum, its native ETH token, smart contracts, gas fees, wallets, and common user mistakes.
Network map
What this means
Ethereum is a smart contract network where users can send ETH, use tokens, interact with decentralized applications, and pay gas fees for on-chain activity.
Core ideas
What to understand first
- Ethereum uses ETH as its native gas token.
- Many tokens, NFTs, DeFi apps, and DAOs started on Ethereum.
- Ethereum transactions can become expensive during high demand.
- Ethereum addresses are compatible with many EVM networks, but assets still live on separate chains.
User checklist
What to check before moving assets
- Confirm that your wallet is on Ethereum Mainnet before sending ETH or Ethereum tokens.
- Use a trusted Ethereum explorer to check transactions.
- Keep enough ETH for gas before swapping, approving, or moving tokens.
- Verify token contract addresses before importing assets.
Risk note
Common mistakes to avoid
- High gas fees can make small transactions uneconomical.
- Fake Ethereum token contracts can copy real token names.
- Sending assets to the wrong network can create recovery problems.