Digital Signal Processing (DSP) is a technique used to manipulate signals that are in a digital format. It involves the use of algorithms and mathematical operations to analyze, modify, and synthesize signals such as audio, video, and sensor data. DSP is essential in various applications, including audio compression, image enhancement, and telecommunications. By converting analog signals into digital form, DSP allows for more precise control and manipulation. This process includes filtering out noise, improving signal quality, and extracting important features. DSP is widely used in devices like smartphones, computers, and medical equipment to enhance performance and functionality.