The term 'storyboard' primarily refers to a visual planning tool used in filmmaking, animation, advertising, and user experience (UX) design. While 'storyboard' itself is often a concept or a type of document, it is sometimes associated with proprietary or application-specific file formats used by specialized software designed for creating and managing these visual sequences. These files typically contain a sequence of images or sketches, often accompanied by dialogue, camera directions, scene descriptions, and timing information. They serve as a blueprint for production, allowing creators to visualize the flow of a narrative or interaction before committing to expensive production stages. Unlike standardized formats like PDF or JPEG, a file explicitly named with the '.storyboard' extension is highly application-dependent. It might store metadata, layout information, and references to embedded media assets. Without a specific application context, it's difficult to define a universal structure, but its core purpose remains the sequential organization of visual scenes for planning and communication.