Megahertz (MHz) is a unit of frequency that measures cycles per second, specifically one million cycles. It is commonly used to describe the speed of computer processors, radio frequencies, and other electronic devices. For example, a processor running at 2.5 MHz completes 2.5 million cycles every second, affecting its performance and capabilities. In the context of radio and television broadcasting, MHz indicates the frequency at which signals are transmitted. Different channels operate at various MHz levels, allowing multiple broadcasts to occur simultaneously without interference. This is crucial for clear communication in technologies like Wi-Fi and cellular networks.