"The Feynman Technique is used to learn theories. Essentially, it’s used to memorize written material. This technique was developed by Richard P. Feynman, a Nobel prize winner who’s widely recognized as one of the most influential and iconic figures of his time.

"Although he was a brilliant scientist (hence the Nobel prize), he’s also known for his learning technique that makes the process extremely simple yet effective. 

"Explain what you’re trying to learn in the simplest of words and notice the gaps in your explanation.

"Once those gaps are exposed, it’s easier for you to fill them up.

"The power and effectiveness of this learning method reside in the ability to simply explain things. Although Feynman studied complex processes, he had the ability to explain them simply enough that even 12-year-olds could understand him. That’s why he was known as 'The Great Explainer'."

Article: Learning Effectively with the Feynman Technique (The Complete Guide)