Cache tuning is the process of optimizing the cache settings and parameters in a computer system to improve performance and reduce latency. This involves adjusting parameters such as cache size, associativity, block size, and replacement policies to better suit the specific workload and access patterns of the system. Cache tuning is an important aspect of system optimization, as it can significantly impact the overall performance and efficiency of the system. By fine-tuning the cache settings, developers and system administrators can achieve better utilization of the cache and improve the speed and responsiveness of the system.