The Feynman Method involves pretending to teach the concept to a student, which forces you to wrangle with the material and create simple learning analogies (if you find that you stumble anywhere in the explanation, you don’t know the concept well enough). After completing the Feynman Method, you now truly understand the concept and own that knowledge.
In a way, my notes are an extended Feynman Method exercise. In a sense, the function of all my notes is to enhance thinking by making each of the often associative connections in my thinking into an explicit, detailed connection (see the function of note-taking is to augment thinking rather than store information).