Arbitrum, a layer 2 solution, aims to alleviate Ethereum's congestion and reduce transaction costs.Ethereum's high gas prices pose a challenge for users, particularly for microtransactions and smaller projects.Arbitrum utilizes Optimistic Rollups to batch transactions, increase scalability, and lower gas fees.The adoption of Arbitrum by major projects like Uniswap and Chainlink is driving its future prospects and broader implications.