Layer 2 Rollups
Layer 2 rollups are a scaling solution for blockchain networks that process transactions off-chain (on a secondary layer) and then post compressed data back to the main chain (Layer 1) for security and finality. They bundle multiple transactions into a single batch, reducing congestion and fees on the base layer while inheriting its security guarantees. This approach enables higher throughput and lower costs compared to executing all transactions directly on the main blockchain.
Developers should learn about Layer 2 rollups when building decentralized applications (dApps) that require high transaction throughput, low latency, or reduced gas fees, such as in DeFi, gaming, or NFT platforms on Ethereum or similar blockchains. They are essential for scaling blockchain ecosystems without compromising decentralization, as they offload computation while leveraging the security of Layer 1. Use cases include optimizing user experience in high-frequency trading apps or enabling microtransactions in web3 games.