Spiral bound refers to a method of binding pages together using a continuous spiral coil, typically made of plastic or metal. This binding technique allows the pages to lay flat when opened, making it easier to write or read. It is commonly used for notebooks, planners, and reports. The spiral binding process involves punching holes along the edge of the pages and threading the coil through these holes. This method is popular in educational settings, as it provides durability and flexibility. Products like notebooks and workbooks often utilize spiral binding for convenience and ease of use.