As blockchain networks gain mainstream adoption, their ability to scale efficiently has become a major hurdle. Ethereum, for instance, struggles with network congestion and high gas fees. Enter Layer 2 solutions—protocols built on top of Layer 1 blockchains that inherit their security but offer much higher throughput. Optimistic Rollups rely on fraud proofs and assume transactions are valid unless challenged. zk-Rollups, on the other hand, bundle transactions and provide cryptographic proof to verify correctness. Both approaches significantly reduce gas costs and improve transaction speeds. In this article, we cover how these solutions work, compare them side by side, and explain how dApp developers can start integrating Layer 2 frameworks like Arbitrum, Optimism, StarkNet, and zkSync. We also discuss risks, limitations, and the future of Ethereum scaling in the context of the broader Web3 ecosystem.