Definition ∞ Rollup Layer Two scaling is a technique that processes transactions off the main blockchain, or Layer One, bundles them, and then submits a single cryptographic proof or summary to the Layer One chain. This approach significantly increases transaction throughput and reduces fees on the main network. It is a primary strategy for enhancing the scalability of decentralized applications.
Context ∞ Rollup Layer Two scaling solutions are at the forefront of efforts to address the scalability limitations of popular blockchains like Ethereum. News frequently reports on the deployment of new rollups, their transaction capacity, and the security models they employ. The ongoing competition and development among various rollup types, such as optimistic and zero-knowledge rollups, are key areas of interest for the future of decentralized finance and web3.