Definition ∞ A rollup scalability layer is a Layer 2 solution for blockchain networks that processes transactions off-chain and then bundles them into a single, compressed transaction submitted to the main blockchain. This method significantly increases transaction throughput and reduces fees on the base layer. Rollups rely on the security of the underlying Layer 1 blockchain for data availability and finality.
Context ∞ Rollup scalability layers, such as Optimistic Rollups and ZK-Rollups, are central to the current strategy for scaling major blockchain networks like Ethereum. Their continued development and adoption are critical for supporting a wider array of decentralized applications and increasing user capacity. The ongoing technical advancements in rollup technology are a primary focus in cryptocurrency news and development roadmaps.