This document discusses Arbitrum, an Ethereum Layer 2 scaling solution. It provides information on Arbitrum's technology which uses rollups to enable faster and cheaper transactions while maintaining Ethereum's security. The document outlines Arbitrum's team at Offchain Labs, its major backers who contributed $120 million, and its achievements like its mainnet launch in August 2021. Metrics on its growth in total value locked and unique addresses are presented. Potential applications being deployed on Arbitrum like Uniswap V3 are mentioned. The document considers arguments for and against Arbitrum having its own native token.