Personally, I recommend this lecture to those who have used Spring MVC but need to understand the principles of its internal operation rather than those who are seeing Spring MVC for the first time. (Of course, this is my personal opinion...) Why did the Front Controller pattern emerge from the existing programming method consisting of only Listener + Filter + Servlet, and what are the advantages of this? I understand it much better because you explain these things in detail. I think that the more you learn about Giseon's lecture, the more you see and learn. Thank you for always giving great lectures.