Gigahertz (GHz) is a unit of frequency that measures cycles per second, specifically one billion cycles. It is commonly used to describe the speed of computer processors, such as those found in CPUs and GPUs. Higher gigahertz values typically indicate faster processing capabilities, allowing devices to perform tasks more efficiently. In addition to computing, gigahertz is also relevant in telecommunications, where it measures the frequency of radio waves used for wireless communication. For example, many Wi-Fi networks operate at frequencies of 2.4 GHz or 5 GHz, affecting data transfer speeds and range.