Through this TDD course, I was able to deeply understand the importance of test-driven development in software development. In particular, the process of writing tests first and then implementing code accordingly clearly showed how it differs from traditional development approaches, which was very helpful for practical application. The course content is structured step-by-step from basic concepts to actual code writing examples, making it easy for beginners to understand. Thanks to the hands-on approach of the course, I was able to gain experience that could be immediately applied rather than just learning theory. Personally, the most beneficial aspect was being able to develop the habit of writing test code and experiencing firsthand how TDD plays a role in improving code quality and maintainability. However, I think it would be more helpful for developing practical skills if some of the practice examples covered more realistic project scenarios. Overall assessment: This is a course I would recommend even to developers who are new to TDD, and I was able to directly experience the advantages of test-driven development through systematic practice.