Sleep quality refers to how well and how much a person sleeps. It is determined by factors such as the amount and depth of sleep, the ease with which one falls asleep, the duration of sleep, and whether or not one feels refreshed upon waking up. Sleep quality can be influenced by various factors including stress levels, diet, exercise habits, and overall health. Poor sleep quality can lead to a range of negative consequences such as fatigue, irritability, difficulty concentrating, and an increased risk for chronic conditions like heart disease or diabetes. Therefore, maintaining good sleep hygiene and addressing any underlying issues that may be affecting one's ability to sleep well is important for overall health and well-being.