As the title suggests, this was a simple but clear lecture for beginner planners/PMs to understand what Test Cases are and why they are needed. However, as mentioned in the beginning of the lecture, it would be better to think of it as a lecture that can motivate and explain the necessity of Test Cases or QA to startups or planners who are just starting out, rather than those who are working in large companies or companies where QA is already well-organized.