A comprehensive digital marketing course covers foundational concepts, Search Engine Optimization (SEO), social media marketing, content marketing, email marketing, paid advertising (PPC), and web analytics. Modules often include developing marketing strategies, creating buyer personas, content creation, setting up ad campaigns, and using tools like Google Analytics to measure success and refine strategies. Recent courses also emphasize emerging trends such as AI-powered marketing and using ChatGPT, and feature hands-on projects and practical application of skills.