One of the first steps you do as an online entrepreneur is select the niche you want to target for monetization. There are many different factors to consider when doing this, including your expertise and interests.
Some people merely go off of what others have been doing and try to copy their process. One thing everyone can agree on is that the niche needs to be highly profitable. Typically, marketers will look at the demand within the niche, and the volume of products (both digital and tangible) they can promote.
However, there is another factor that is often overlooked, which can explode your earnings significantly. This is known as the crossover potential that a niche has.