I highly recommend this to those who are starting out on their own and are feeling lost. With strong motivation, I decided to become an iOS developer and took free online lectures from Korea and abroad for 2 weeks on my own, but I was confused because they were not organized. This lecture not only organizes the overall content, but also explains in detail why this grammar is structured like this and how these structures are formed, so I understand it well. It is not a lecture material that only has a lot of text, but it visualizes vague concepts with figures and pictures, so I understand it better. If you want to study but are worried about going to an offline boot camp or taking an online lecture, don't worry and take this lecture. You may be worried about the price at first, but if you take the lecture yourself, it is definitely worth the money.