Computer-aided design (CAD) is a technology that uses software to help create, modify, analyze, and optimize designs. It is widely used in various fields, including architecture, engineering, and product design. CAD allows designers to create precise drawings and models, making it easier to visualize and communicate ideas. With CAD, users can work in both 2D and 3D formats, enabling them to see how a design will look and function before it is built. This technology improves efficiency, reduces errors, and allows for easier collaboration among team members, ultimately leading to better and more innovative products.