Arbitrum is a Layer 2 scaling solution for Ethereum, enhancing its capabilities without compromising security using Optimistic Rollups.
Transactions on Arbitrum are batched off-chain, with results settled on Ethereum, providing low fees, fast transactions, and Ethereum-level security.
Arbitrum's Optimistic Rollups assume transaction validity, allowing challenges for fraud detection, creating an efficient trust-but-verify model.
Arbitrum serves as a high-speed express lane for Ethereum, enhancing scalability and enabling various applications such as DeFi, GameFi, NFT platforms, and cheap governance for DAOs.