BitGo supports ARB, a traditional ERC-20 governance token for Arbitrum, offering customers custody options including hot, custodial, and cold wallets, including self-managed cold wallets.

Arbitrum, a Layer 2 technology, enhances Ethereum's services by improving transaction speed, upgradability, and privacy features. It addresses Ethereum's smart contract limitations such as inefficiencies and high implementation costs.

Arbitrum's rollup technology enables developers to migrate smart contracts from Ethereum to Layer 2, facilitating upgradability and interaction with multiple smart contracts on both chains.

As an optimistic rollup for Ethereum, Arbitrum enhances the scalability of decentralized applications (dApps) by reducing transaction fees and offloading traffic from the Ethereum mainnet to Layer 2 chains, while maintaining security and decentralization.

BitGo also supports other tokens like Arbeth, Chainlink (Arbeth:Link), USDC, and USDT, alongside the introduction of the ARB ERC-20 token.