RocksDB is an open-source, high-performance key-value store designed for fast storage. It is built on top of LevelDB, which was developed by Google, and is optimized for use with solid-state drives (SSDs). RocksDB is particularly useful for applications that require low-latency data access and can handle large amounts of data efficiently. RocksDB supports various features like compression, transactions, and multi-threaded compaction, making it suitable for a wide range of use cases, including big data and real-time analytics. Its architecture allows for easy integration with other systems, enhancing its versatility in modern data-driven applications.