What is the primary purpose of a storyboard in design?

The primary purpose of a storyboard is to outline a film's narrative. A storyboard serves as a visual representation of how scenes will unfold in a sequence, enabling creators to map out the story arc, pacing, and transitions between scenes. Each frame in the storyboard typically illustrates key moments of action and dialogue, which help filmmakers keep track of storytelling elements and ensure coherence in the narrative.

In contrast, planning the user interface focuses more on the design elements that a user interacts with in software applications, which is not the main concern of a storyboard. Creating a 3D model pertains to the development of three-dimensional representations in design and animation, separate from the narrative-focused intent of a storyboard. Similarly, developing a marketing strategy involves planning promotional tactics and is distinct from the storytelling function of a storyboard.