Immutable refers to the unchangeable nature of data recorded on a blockchain. Once information, such as transactions or smart contracts, is added to the blockchain, it becomes permanent and cannot be altered or deleted.This characteristic relies on cryptographic hashing, where each block of data is linked to the previous one. If someone attempts to modify a block, it would change its hash, disrupting the entire chain. This makes tampering evident and significantly difficult.The immutability of blockchain enhances security and trust. Users can verify the integrity of the data without needing a central authority. This transparency helps prevent fraud and increases accountability among participants.Overall, immutability is one of the key features that makes blockchain technology appealing for various applications, including finance, supply chain management, and identity verification. By ensuring that records are permanent, it fosters confidence among users and supports decentralized systems.