Gigahertz (GHz) is a unit of frequency that measures how many cycles or oscillations occur in one second, with “giga” representing one billion. So, 1 GHz equals one billion cycles per second. It’s commonly used to describe the speed of processors in computers, where it indicates how many instructions the processor can execute per second. For example, a 3 GHz processor can perform three billion operations each second. Beyond computing, GHz is also used in telecommunications and electronics to describe radio wave frequencies, like those used in Wi-Fi or cellular networks. Essentially, it’s a measure of speed and efficiency.