Sleep health is important because sleep is essential for physical and mental health, including brain function, immune function, and mood regulation. Symptoms that may indicate a need for sleep supplements include difficulty falling asleep, difficulty staying asleep, and daytime fatigue. Supplements like melatonin, magnesium, and herbal supplements like valerian root and chamomile can help promote relaxation, regulate the sleep-wake cycle, and improve sleep quality. Lifestyle changes like reducing caffeine intake and creating a relaxing bedtime routine can also be beneficial in improving sleep health.