When building interactive graphics applications, it is essential to allow users to save their work or transfer it between sessions or devices. Fabric.js provides a straightforward way to achieve this by serializing the entire state of the canvas. The primary method for this purpose is the toJSON function, which converts all objects and properties on the canvas into a JSON string. By exporting the canvas state as JSON, you can store user creations, send them to a server, or load them later for continued editing. This approach is vital for applications such as online design tools, collaborative editors, and any context where persistent or transferable graphics are needed.