Sleep involves precise patterns of brain activity and physiological changes that support essential functions for health and survival. Each night, the brain cycles through distinct sleep stages, from light sleep to deep sleep and REM sleep, each serving a distinct physiological function. Different life stages require varying amounts of sleep, with newborns needing up to 18 h while adults generally require 7–9 h. During sleep, the brain processes memories, repairs tissues, strengthens the immune system, and clears metabolic waste, to name only a few of its critical roles. Sleep quality, influenced by factors like temperature and daily habits, proves is nearly as important as sleep quantity.