As expected, JSCODE is a name you can trust! I previously only knew Redis as a fast cache and was unsure how to use it effectively in practice. However, thanks to JSCODE's "magic," the use cases for each data structure were explained so clearly with real-world examples. It was absolutely great! I'm so satisfied because I can apply this to my current project right away!! The part where we verify performance improvements through load testing with k6 was also fantastic. It felt like all the previous lectures were connecting, making my portfolio feel much more solid!!