the worst A nap is a short period of sleep taken during the day, usually to rest or regain energy. People often take naps when they feel tired, stressed, or need a mental break from work or school. Naps can last anywhere from a few minutes to about an hour, depending on the person and the situation. Unlike nighttime sleep, naps are meant to be brief and refreshing rather than long and deep. Napping can have several benefits when done in moderation. A short nap can improve focus, mood, and memory