An Analog to Digital Converter (ADC) is an electronic device that transforms continuous signals, such as sound or light, into a digital format that computers can process. This conversion allows analog information, which varies smoothly over time, to be represented as discrete values, making it easier to store, manipulate, and transmit. ADCs are essential in various applications, including audio recording, video processing, and sensor data collection. They enable devices like smartphones and cameras to capture real-world signals and convert them into digital data, facilitating modern technology's functionality and efficiency.