What is the origin of the idiom "have it going on" and when to use it?

It originated in African American Vernacular English in the mid-20th century and was used to describe someone who had charisma, confidence, and a certain charm or appeal. It is often used informally in casual conversations, particularly in discussions about someone's physical appearance or personal qualities. It is important to note that this idiom is informal and may not be appropriate in formal or professional settings.