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There are different ways to market an ebook. One of the most common is through Amazon’s Kindle program. They can help you with all the steps to both publish and market your ebook through their incredibly popular platform. There are some specialized sets of writing software that will help with not only writing your ebook, but also formatting it correctly for the Amazon market as well Barnes & Noble and iTunes
Build your audience on a course community: If you’re just getting started building an audience for yourself and want to leverage communities already actively looking for content you can choose to host and sell your online course on a site like Skillshare or Udemy. These are easy, cost-effective ways to build an audience and test your niche to see if there’s demand for it.
If you check out some of the suggestions below this though, you're likely to find some opportunities. You can also plug in a few variations of the question to find some search volume; for example, I could search for "cup of java" instead of "what is the meaning of a cup of java" and I'll get a number of keyword opportunities that I can align to the question.
VIPKID provides an international learning experience to children in China between the ages 4-12. Headquartered in Beijing, the company offers fully immersive one-on-one English language instruction provided online by highly qualified teachers. The curriculum is based on the U.S. Common Core State Standards and uses a flipped-classroom approach to foster creativity and critical thinking skills.