Rollup aggregation is a method used to enhance the scalability and efficiency of blockchain networks. It involves bundling multiple transactions into a single group or “rollup,” which is then processed off the main blockchain.This approach reduces the amount of data that needs to be stored on-chain, significantly lowering transaction costs and improving processing speed. There are two main types of rollups: optimistic and zero-knowledge. Optimistic rollups assume transactions are valid and only check for fraud if a challenge is raised. Zero-knowledge rollups, on the other hand, use cryptographic proofs to verify transactions without revealing all the data.Overall, rollup aggregation helps to alleviate congestion on blockchains, allowing for a higher volume of transactions while maintaining security and decentralization. This makes it an essential solution for projects seeking to support growing user bases and increased transaction activity.