This lecture helped me, a non-computer science major, solidify my basics. In particular, the biggest advantage is that you can understand various grammatical contents by looking at the memory structure at a glance rather than relying on simple memorization. If you simply memorize contents such as classes, inheritance, structures, closures, and protocols, you will learn numerous cases without any connection and you will not know “why”, so I think your application ability will be low. On the other hand, if you learn based on the memory structure, you will be able to understand the overall grammatical contents in a large framework, so memorization will follow naturally, and since you will know the operating principles in the memory unit, you will be able to apply them in various situations. I felt that the lecture method and structure thoroughly prioritized “understanding.” You can look at actual case codes, understand the memory structure on one page, and organize the concepts through easily summarized tables. In fact, I was worried before taking the course because I had never paid this much for a lecture, but after taking the course, I thought that it was the cheapest lecture if I calculated the time I could gain with this amount of money. In conclusion, I recommend this course to those who want to reduce trial and error time and quickly build up a solid foundation!