What does cache memory primarily store?

Cache memory primarily stores frequently accessed data. This type of memory is designed to speed up data access for the CPU by keeping a small, fast area of storage that holds copies of the data and instructions that are used most often. By storing frequently accessed data, the cache reduces the time it takes for the processor to retrieve this information, which improves overall system performance.

In contrast to other types of storage, such as temporary files, operating system files, or user-generated content, cache memory is specifically optimized for quick read and write access to enhance processing efficiency. Temporary files, for example, may be used for various storage needs but are not necessarily accessed frequently. Operating system files are essential for the system's functionality but are typically loaded into memory from a slower storage medium rather than stored in cache. User-generated content, while important, is also not saved in cache as it is generally stored on persistent storage like hard drives or SSDs for long-term retention. Thus, the primary role of cache memory is to store data that the CPU needs to access quickly and frequently, making it an essential component of modern computer architecture.