Dreams occur during sleep and can involve stories, images, emotions, and thoughts. Studies have shown dreams are important for health and well-being. Experts have various theories for why we dream, such as to solve problems, process memories and emotions, or reflect unconscious thoughts and feelings. Different types of dreams include normal dreams, daydreams, nightmares, progressive dreams, recurring dreams, lucid dreams, false awakenings, healing dreams, prophetic dreams, signal dreams, epic dreams, and mutual dreams. Tips are provided for improving dream recall and interpretation. However, the exact purpose and meaning of dreams remains unclear.