Optimistic Rollups are a layer 2 scaling solution designed to improve the efficiency and speed of blockchain transactions. They work by processing transactions off the main blockchain while still relying on it for security.In an Optimistic Rollup, transactions are bundled and executed off-chain. They assume that all transactions are valid by default, hence the name “optimistic.” If someone believes a transaction is fraudulent, they can challenge it by submitting a proof to the main chain.This system allows for high throughput and lower fees, making it easier for applications like decentralized finance (DeFi) and non-fungible tokens (NFTs) to operate efficiently. Since the main blockchain only processes disputed transactions, it can handle a much greater load.Optimistic Rollups prioritize user experience by providing faster confirmations, while still maintaining the security and decentralization benefits of the main blockchain. As a result, they are seen as a promising solution to the scalability issues faced by many blockchain networks.