If you want to understand something well, try to explain it simply. By attempting to explain a concept in simple terms, you’ll quickly see where you have a good understanding of that concept. You’ll also be able to instantly pinpoint your problem areas, because they’ll be the areas where you either get stuck or where you end up resorting to using complex language and terminology. This is the idea behind the Feynman Technique.
The Feynman Learning Technique
If you want to supercharge your learning and become smarter, the Feynman Technique might just be the best way to learn absolutely anything.