A spiral-bound notebook is a type of notebook that is held together by a spiral wire or plastic coil. This design allows the pages to lay flat when open, making it easier to write or draw. The spiral binding also enables the notebook to open fully, providing access to all pages without any obstruction. Spiral binding is commonly used in various stationery products, including planners, sketchbooks, and workbooks. This method of binding is popular because it is durable and flexible, allowing users to flip pages easily. Additionally, spiral-bound notebooks often come in different sizes and styles to suit various needs.