I am writing a course review because I suddenly got a sudden shock while listening to the lecture. As I learned the Spring Roadmap from the basics, I realized that there is so much to learn and so much conceptually difficult content. It is not only difficult to learn all of the content on your own, but it is also impossible to write example code yourself. This lecture introduces useful functions used in practice. Since it is the latest technology, it is naturally a complex and difficult concept, and there is so much basic knowledge that you need to know to understand the technology. In Mr. Kim Young-han's lecture, all the basic knowledge necessary to understand the concept is taught step by step from the beginning. Therefore, you can easily understand why the technology is used and how it came to be here, and learn how to use it, and if a problem occurs, you can figure out where the problem occurred. This lecture is conducted based on the lecture materials provided. In other words, you can easily review the content or extract the necessary parts based on the materials without having to watch the lecture again. Since the lecture script = lecture materials, it is very helpful for referencing the necessary content. Of course, the code is also included in the materials. It teaches the necessary parts in an easy and detailed manner, so even beginners can follow along without difficulty. I think it is a must-read roadmap for those studying Spring, and I highly recommend it.