Data Immutability is a core feature of decentralized databases that guarantees the integrity and permanence of data. Once data is written to the database, it becomes immutable, meaning it cannot be changed or deleted. This feature is crucial for maintaining trust and accountability in systems where data integrity is paramount, such as financial transactions, legal records, and supply chain management. By leveraging cryptographic techniques and decentralized consensus mechanisms, data immutability ensures that all entries are verifiable and tamper-proof, thereby fostering a transparent and secure data environment.