Sleep is a natural state of rest for the body and mind, characterized by reduced consciousness and decreased sensory activity. During sleep, the body undergoes various processes, including tissue repair, muscle growth, and memory consolidation. The sleep cycle consists of different stages, including REM (Rapid Eye Movement) and NREM (Non-Rapid Eye Movement) sleep, each playing a crucial role in overall health. The science of sleep explores how these stages affect physical and mental well-being. Factors such as circadian rhythms, sleep disorders, and environmental influences can impact sleep quality. Understanding these elements helps improve sleep hygiene and promotes better health outcomes.