1. Dance is an art form with strict norms and skills, and it usually takes a long time to reach a certain level. Dance is usually a form of expression, expressing emotions, stories or themes through the dancer's body language.

2. Happy dance step is a form of fitness, which usually doesn't require much skill or dance training. The purpose of happy dance steps is to consume energy, enhance heart and lung function and exercise through dancing. The dance style of happy dance steps is usually relaxed, cheerful and easy to use, which is suitable for mass dance.

3. The musical style of dance is usually varied, which can be classical music, modern pop music and so on.

4. Cheerful dance steps usually choose popular fashion music to increase the fun and cheerfulness of the dance.