Hello, Dongseonambuk. Checking your course progress, I see you have completed up to the metric definition section. The first 40% of the course covers problem and metric definition, as these are core elements for working effectively. Section 6 features a project on improving payment conversion rates, which presents a vivid real-world case. It specifically covers the methods used in actual companies, and some students have found it helpful to adopt these methods in their own work. Therefore, I suggest you finish the metric definition exercises in Section 5, solve the problems, and then move on to the project section. The log design portion covers most of what is actually done in the field. The course is structured to define general concepts first and then gradually move into specifics. I recommend you continue with a few more lessons 🙏