Through the "Next.js Bite-Sized" course, I was able to learn the core concepts of Next.js without feeling overwhelmed. It was easy to understand because it didn't just explain the differences between SSR, SSG, ISR, and CSR in theory, but also showed which situations to use them in practice. In particular, I was able to understand why Next.js is necessary compared to using only React, and how page rendering methods affect service performance and SEO. Since the lectures are organized into short segments, it was great for quickly reviewing necessary concepts, and it was a helpful reference when applying them to my projects.