Electricity is essential for us, but traditional grids face challenges. Smart grids and demand response help manage electricity better. Deep Learning can analyze data from power sources and predict electricity demand. This survey explores how Deep Learning can improve smart grids and demand response. It explains the basics of Deep Learning, smart grids, and demand response. It also shows how Deep Learning can forecast electricity usage, detect energy theft, and more. Real-life examples demonstrate the benefits of using Deep Learning in smart grids. Challenges and future directions are also discussed.