Déjà vu is a French term that translates to "already seen." It describes the sensation that a person feels when they believe they have experienced a situation before, even if it is happening for the first time. This phenomenon can be fleeting and often leaves individuals feeling confused or intrigued. Researchers suggest that déjà vu may occur due to a temporary glitch in the brain's memory processing. It can happen in various contexts, such as during conversations or while visiting new places. While it is a common experience, the exact cause and mechanisms behind déjà vu are still not fully understood.