A wireframe is a low-fidelity visual representation of a product or service that outlines the structure and layout of the user interface. It is a useful tool in the UX design process because it allows designers to quickly and easily communicate their ideas and get feedback on the overall structure and layout of a product or service.  Wireframes are typically created using simple shapes and lines, and do not include any visual design elements such as colors, fonts, or images. This allows designers to focus on the structure and functionality of the product, rather than getting distracted by the visual design.  Wireframes are important because they provide a clear and concise overview of the product or service and allow designers to identify and address any potential problems or issues early on in the design process.