Cache memory is a small, super-fast storage area in a computer that helps it run faster. It keeps copies of data and instructions that the CPU often needs, so the CPU can access them quickly instead of going to the slower main memory. There are usually three levels of cache: L1 Cache: This is the fastest and smallest, located very close to the CPU. It stores the most frequently used data and instructions. L2 Cache: This cache is larger than L1 but a bit slower. It provides extra storage for data the CPU might need. L3 Cache: This is the largest and slowest of the three. It is shared among all the CPU cores, helping to speed up access to more data. The main job of cache memory is to make data access faster. When the CPU needs information, it first checks the cache. If it finds what it needs there, it can get it almost instantly. If not, it has to look in the slower main memory, which takes more time. This setup helps your computer work more efficiently and quickly.