It was very helpful in increasing my understanding of Spring. It covers the contents covered in the introduction in more depth with examples. I was wondering which one to take first between Spring Boot and this course, and I chose it, but I think it won't be a big problem to take either one first or later. If you want to learn more about Spring, take this course as a prerequisite, and if you want to learn the core after learning a little about Boot, take Boot as a prerequisite. It's easier to understand when you listen while typing together, and the instructor's excellent explanations are always the best. Next, let's go to Boot!