Discuss the importance of the "D" in ACID properties and its implications in database management systems.

The "D" in ACID stands for Durability, which ensures that once a transaction is committed, it will persist even in the face of system failures such as power outages or crashes. This is crucial for maintaining the reliability and resilience of a database system, as it guarantees that data modifications made by transactions are permanent and will not be lost due to unforeseen circumstances. Without durability, data could be lost or corrupted, leading to inconsistencies and potential data loss. Therefore, the importance of durability in ACID properties cannot be overstated, as it forms the backbone of data persistence and reliability in database management systems.