This is a question that we receive from our community of online course creators on a regular basis. Now, they may not use those exact words, but the issue remains: they have a course to sell, but they don't have any students yet. Maybe you're in this exact situation right now. If that's the case, our advice is simple: start promoting it!
No matter what you're trying to sell – whether it's an online course or some other product or service – until you tell people about it, there is a really good chance that no one is going to see it. And if no ones sees it, no one buys it, which means all the blood, sweat, and tears that you invested into creating it are pretty much wasted.