Cache Hit

A cache hit occurs when the data a computer program needs is already stored in the cache, a small, fast memory close to the processor. Instead of retrieving the data from the slower main memory, the processor quickly accesses it from the cache, improving overall efficiency. Think of it like finding a frequently used item already at your fingertips instead of searching through a larger, less accessible storage. When cache hits happen often, the system runs faster because it avoids delays caused by fetching data from the main memory.