Digital Signal Processing (DSP) is a specialized skill that involves analyzing, processing, and manipulating digital signals, such as audio, video, and images. It utilizes mathematical algorithms and techniques to enhance the quality of digital signals and extract useful information from them. DSP is widely used in various industries, including telecommunications, audio and video processing, medical imaging, and control systems. It requires specialized knowledge of mathematics, computer science, and signal processing techniques, as well as experience with DSP software and tools.