Arbitrum

Arbitrum is an Ethereum Layer-2 that uses optimistic rollups to make transactions much cheaper and faster while inheriting Ethereum's security. It's one of the largest L2 ecosystems for DeFi.

ARB is Arbitrum's governance token, used to vote on protocol decisions. Note that gas on Arbitrum is paid in ETH, not ARB.

Bridge ETH or tokens from Ethereum using the official Arbitrum bridge, or withdraw directly to Arbitrum from an exchange that supports it. You'll use ETH for gas.

Yes — Arbitrum is EVM-compatible, so its tokens follow the ERC-20 standard and work with standard Ethereum wallets and tools.

Arbitrum runs on top of Ethereum as a Layer-2, offering dramatically lower fees and faster confirmations while ultimately settling to the Ethereum mainnet.

Any EVM wallet like MetaMask or Rabby. Add the Arbitrum network, bridge some ETH for gas, and your tokens will show up.