This video explains the Feynman Technique, a learning method developed by Nobel laureate Richard Feynman, to help individuals truly master knowledge rather than just passively absorb it. It addresses the common problem of forgetting information shortly after learning it, attributing it to the "illusion of familiarity" where rapid processing is mistaken for comprehension. The video outlines a four-step process to effectively learn and retain information by focusing on explaining concepts in simple terms, identifying knowledge gaps, and simplifying complex ideas.