So there could be multiple reasons why your online course isn't selling. The five main reasons your course isn't selling:1. Your target audience is unaware of your brand and courses.2. They don't know the benefits of following your online course.3. They don't see the added value of following your course.4. The course isn't exactly what they are looking for.5. They can't find or buy your online course, so they can't buy it either.