Layer 2 solutions designed to help scale blockchain networks. Rollups move part of transaction processing outside the main chain, bundle multiple operations into a single package, and then submit them to the Layer 1 blockchain in compressed form. This approach reduces network congestion, lowers transaction fees, and speeds up processing while preserving the security of the underlying blockchain. Rollups are most commonly used in the ecosystem of Ethereum, where high network load and expensive transactions are a frequent issue.