What is what does sweet dreams mean?

Sweet dreams is a phrase commonly used to wish someone a peaceful and pleasant sleep. It refers to hopeful and happy visions of the subconscious mind during sleep, which are considered to be the hallmark of a restful sleep. Sweet dreams are often associated with positive emotions and feelings and are believed to contribute to better mental health and overall wellbeing. The phrase is frequently used as a calming aid for children before bedtime, as it helps them to relax and settle down for the night.