The study highlights the crucial role of professional social media and LinkedIn instruction for students seeking employment. An analysis of 20 business and technical communication textbooks identifies significant gaps between textbook guidance and real-world expectations. Some textbooks in both fields fall short in offering actionable strategies for creating and maintaining a professional social media presence. While many textbooks emphasize the importance of social media or LinkedIn, most fail to provide concrete examples or best practices, such as keyword optimization for AI, effective networking strategies, and best practices for posting content. Grounded in digital literacy theory and professional identity formation, the study provides teaching recommendations, including the identification and adoption of supplemental materials to teach professional social media usage.