The Optimism Token (ticker symbol OP) is an ERC-20 token that lets you participate in the
governance of the Optimism protocol and public goods funding.
Note that you do not need OP to use Optimism or pay for gas. Transactions are paid for in ETH, which you transfer onto Optimism using a bridge.
Note: These tokens are on Optimism, address `0x4200...0042`. At present there is no equivalent L1 asset, the tokens are not bridgeable to L1.