Here are some people who would benefit from this lecture: - People who think, "Oh no... What should I do?" when they hear the term "asynchronous processing" - People who solve problems by Googling, but have no idea why the code is written this way or if the logic matches the requirements That's me in the past. ◠‿◠.. I searched and read a lot of GCD-related materials to understand concurrency, asynchrony, etc., but my understanding was zero, and I continued to develop without understanding why and how to use it in what situation. Then, when I found out that this lecture was included in the mandatory iOS development lectures designated by the company, I thought, "This is it!" I heard about it and as soon as I listened to the first lecture, I knew that this lecture is the only lecture that I have come to finish GCD, which has been an unknown area for a long time. Every lecture is explained with pictures and examples. Wow.. The pictures are really God's work.. It's just.. It's the best.. Now, when I come across the content, the pictures are drawn in my head. Regardless of the field, I can confidently say that this is the only lecture among all the online and offline development lectures I have taken so far. If you leave a question, they will answer it in detail and kindly, so you can make the lecture 100% your own. Lastly, this lecture is a great help in understanding asynchrony/concurrency regardless of the language. I had a chance to read an article about async and await in JavaScript a while ago, and it was so easy to read that I thought, wow, this is a really great lecture. Well... To summarize in one word.. "I recommend the best lecture!" Mr. Alan, I hope you work less and earn more.. I hope you inhale wealth and exhale health...........!!!!!!!!!!!!!!!!!!!