Food and beverage marketing influences the diets and health of children and adolescents. The food industry spends $1.8 billion per year on marketing to youth in the United States. The foods and beverages most heavily marketed to youth are for unhealthy products, high in calories, sugar, fat, and/or sodium, that do not align with national recommendations for healthful diets. Research in this area examines how the elements of marketing—including product, price, placement, and promotion—influence the food and beverage preferences and choices of children and youth, as well as their weight status, and how such elements can be used to promote healthier eating among youth to prevent obesity.