@timoze Arbitrum is a Layer 2 scaling solution for Ethereum, designed to enhance the speed and cost-efficiency of transactions while maintaining compatibility with Ethereum's security and decentralization. Developed by Offchain Labs, Arbitrum leverages rollup technology to process transactions off-chain and then submit summarized data back to the Ethereum mainnet.

Key Features of Arbitrum:
Rollup Technology:

Arbitrum uses optimistic rollups, where transactions are assumed to be valid unless proven otherwise.
A challenge system ensures the validity of transactions, enabling security while offloading computation from Ethereum's main chain.
Ethereum Compatibility:

Fully compatible with Ethereum smart contracts and the Ethereum Virtual Machine (EVM), making it easy for developers to migrate or build decentralized applications (dApps) on Arbitrum.
Cost-Effectiveness: