I was preparing a project using Spring MVC. I knew what code to use, but I didn't know the reason and principle for why I had to use it, so I found myself at a loss even when a few variables were created. So I chose Younghan's lecture to go back to the beginning and study again. Now that I've studied the entire structure of Spring MVC, it's much easier to solve errors and apply it than before. The learning method of gradually correcting the methods of ancient(?) developers was a great help in understanding Spring MVC. It's still not enough to say that I completely understand it, but I think that if I review it, I'll be able to play with Spring someday. ㅎㅎ When I first prepared the project, I felt like I was thrown into a vast ocean, but now I feel like I've acquired a compass and oar! Thank you so much for the great lecture.