Scroll is a Layer 2 scaling solution designed for Ethereum, leveraging zero-knowledge rollup (zk-rollup) technology to increase transaction throughput and reduce costs without compromising on security and decentralization. By using zk-rollups, Scroll processes transactions off-chain and then submits a summary to Ethereum's Layer 1 for verification, making it more efficient for developers and users to interact with Ethereum-based applications.

One of the unique features of Scroll is its zkEVM (Zero-Knowledge Ethereum Virtual Machine), which enables full compatibility with Ethereum's existing infrastructure. This means that developers can easily migrate their decentralized applications (DApps) to Scroll without any changes, allowing for seamless integration while benefiting from lower gas fees and faster transaction speeds.

Scroll's architecture includes three main layers: the settlement layer on Ethereum, a sequencing layer for processing transactions, and a proving layer where zk-proofs are generated to ensure transaction validity. This structure provides strong security guarantees and scalability, making Scroll a promising solution for Ethereum's scalability challenges and the growing demand for decentralized applications.