This is a concise and to-the-point lecture. I am a publisher + developer who works mainly on the front end, but I knew almost nothing about nodeJS. However, after taking this course, I was able to understand and collaborate on the back end more easily. In particular, I liked that it explained the core and code, leaving out all the long-winded explanations. Thanks to this, I think I was able to learn quickly. If you don't know anything about JavaScript, you won't know what I'm talking about, so you need to know at least the basic grammar. Based on my experience, I think it's good to study if you only know the basics of JavaScript. Thank you! I learned a lot~