However, collectively, they do represent the many activities that you should be working on everyday to get your course sales funnel up and running. What that process looks like will depend very much on your existing knowledge of and execution on these components, your financial and personal motivations, time, talent and more.  No matter what, you want to be working on as many of these bits as possible to get those conversions.
_{According to Pardot, 70% of buyers turn to Google at least 2-3 times during their search to find out more about their problems, potential solutions, relevant businesses, etc. Many people also turn to social media and forums for recommendations. At this point, they aren’t looking for promotional content; they’re looking to learn more about potential solutions for their need.}
As a software engineer myself, I can tell you that building funnels from an application standpoint takes massive amounts of work. There's a great deal of coding and integration that's required here. From email systems to landing page implementations to credit card processing APIs, and everything in between, so many platforms need to "talk," that it takes the bar too high for the average marketer. 
_{One of the core concepts in the digital marketing industry is the sales funnel. While odd sounding at first, this single core concept can take a business from virtually non-existent and unknown to multi-million-dollar marketing machine with mass saturation, seemingly overnight. In fact, there are skilled practitioners who have built a career around implementing this single concept in business.}