Hot dog toppings enhance the flavor and texture of the classic hot dog. Common toppings include mustard, ketchup, relish, and onions. Each topping adds a unique taste, allowing for personal customization. Regional variations also exist, such as the Chicago-style hot dog, which features toppings like pickles, tomatoes, and sport peppers. In contrast, the New York-style hot dog is often topped with sauerkraut and mustard. These diverse toppings reflect local preferences and traditions, making hot dogs a versatile food choice.