What is the primary purpose of a wireframe?

The primary purpose of a wireframe is to illustrate the content and layout of a user interface without diving into specific design details. Wireframes serve as a blueprint for the structure of a digital product, emphasizing the placement of elements such as text, images, buttons, and other content. This helps designers, stakeholders, and developers to focus on the functional aspects and flow of the product rather than visual design elements like color schemes or typography.

By omitting intricate design elements, wireframes allow teams to quickly communicate ideas, refine functionality, and assess how users will interact with various components. This clarity enables constructive feedback early in the design process, ultimately guiding the development of a more user-centered product.

The other options do not reflect the primary intent of a wireframe. For instance, while detailed visual designs are important in later stages, they are not the focus of a wireframe. Similarly, using a wireframe as a marketing tool or to replace user testing undermines its fundamental role in the development cycle, which is to capture the essential structure and functionality of the interface.