A nap is a short period of sleep, typically lasting from a few minutes to a couple of hours. Naps are often taken during the day to help alleviate fatigue and improve alertness. They can be beneficial for enhancing mood, cognitive function, and overall well-being. Napping can vary in duration and timing, with common types including power naps (around 20 minutes) and longer naps (up to 90 minutes). Many people find that a nap can help them recharge, making it easier to focus on tasks later. Naps are especially popular among students, shift workers, and those with busy lifestyles.