I think anyone who has tried to write a blog post that is not just a summary of what they have studied but also easy for a first-time reader to understand will appreciate this lecture. The former takes less time because the reader is themselves, but it can be difficult for a first-time reader to understand. However, in the latter case, it takes a lot of time and thought to decide where to start and where to end the topic and how to structure the article in order to write so that even a first-time reader can understand it. I think this lecture is deeply embedded with such thoughts for the reader. I don't think that the ability to organize fragmented knowledge into an easy-to-understand way can be acquired just by being a skilled developer. Nevertheless, I would like to express my gratitude to Kim Young-han for creating such a great lecture.