Designing effective developer documentation is crucial for API-driven or business-to-developer companies as it serves not only as a technical resource but also as a marketing tool. Companies typically structure their documentation in one of three ways: centralized docs with separate API references, centralized docs combined with API references, or decentralized docs organized around product lines. Each approach has its own benefits and downsides, such as facilitating targeted developer guidance or potentially causing navigation issues. Moesif, a company focused on API analytics, illustrates these strategies by organizing its documentation to cater to different developer needs, such as separating main developer docs from API references to prevent confusion. They also utilize tools like GitHub and markdown to enhance community engagement and documentation accuracy. The choice of documentation structure should align with a company's product focus and the needs of both developers and non-developers, ensuring that the documentation remains accessible and informative for all users.