This is a massive course about Materials in Blender. It will guide you from the beginning where you literally know nothing until you reach a level where people envy your knowledge about material. The course touches all aspects around Material and have tons of examples that you will be able to use in your daily work even after you have ended the course.
I will not go through just how you do stuff, but also why and all the terms used. As an example, of many in the course, we build a glass material from scratch that will have both refraction, caustics and all the other complex stuff you have in glass, but will be both faster to render and with less noise compared to Blenders original way to do caustics and glass together.
I also go through different techniques on how to apply material so you get a good grip on how to use UV, apply decals and so on...so it's not "just" procedural even if you will get a lot of that as well. In short...I will cover all you ever will need to know about how to start and understand how material works in Blender.
It's concentrated to the engine Cycles, since Eevee still lacks a few features but most of what you learn, you can do in both engines.