Arbitrum is a layer-2 scaling solution for Ethereum designed to improve transaction speed and reduce costs while maintaining the security of the Ethereum network.

The platform uses optimistic rollup technology to process transactions off-chain and then securely record them on the Ethereum blockchain, significantly increasing scalability.

The ecosystem is powered by the ARB token, which is used for governance and allows token holders to participate in decisions related to the future development of the Arbitrum network.