The Money Supermarket advert promotes joining their service to save money on various financial products like insurance. It uses humor and depicts a man named Phil enjoying privileges like an invisible car after joining Money Supermarket. The ad aims to make the company well known through an intriguing comedic style. It employs persuasive techniques like portraying a reward of feeling "epic" by joining and evoking jealousy in others who haven't. The key messages are that joining Money Supermarket allows you to pay less and feel superior or important compared to others.