The Arbitrum Network is a Layer 2 under Ethereum and uses the Arbitrum bridged Ethereum Coin for gas fees (sometimes called ARBBETH). This means you may use your Ethereum Wallet Address.
You may use many tokens in your wallet to SWAP into ARBETH (even BNB). Along with the new CERT token the ARBETH will be needed to have when using Certicosign.com instead of BNB; it will also be needed to move on the Arbitrum network.
IMPORTANT: Make sure when you SWAP or buy you use the Arbitrum bridged Ethereum Token and not the Arbitrum Token on Ethereum or Arbitrum. The price of the Arbitrum bridged Ethereum token mimics the price of Ethereum. The Arbitrum token is about $1-2 USD.
How to get Arbitrum ETH (ARBETH)? Or, go to Arbitrum’s Official Site to SWAP.
How to get ETH and USDC on Arbitrum: Step-by-Step