What is a CPU clock and how does it impact the performance of a computer system?

A CPU clock is a device that regulates the speed at which a computer's central processing unit (CPU) carries out instructions. The clock speed, measured in gigahertz (GHz), determines how quickly the CPU can process data and perform tasks. A higher clock speed generally results in faster performance, as the CPU can execute instructions more quickly. However, other factors such as the number of cores and the efficiency of the CPU architecture also play a role in overall performance.