how to check if the niche I found is the real niche.

When first applying the method of checking whether the niche I have found is a real niche, I have organized the structures, screens, and priorities that often get blocked based on the standards of non-majors. We have organized key standards, common mistakes, inspection points, and next actions in one place so that you can directly attach them to the actual planning and execution flow, so apply them right away.