A sketch is a quick, freehand drawing that captures the basic elements of a subject. Artists often use sketches to explore ideas, plan compositions, or practice their skills. Sketches can be made with various tools, including pencils, charcoal, or ink, and they can range from simple outlines to more detailed representations. Sketches are commonly used in fields like architecture, fashion design, and animation to visualize concepts before creating final pieces. They serve as a valuable tool for artists and designers, allowing them to experiment and refine their ideas in a less formal way.