Fast-food chains are restaurants that serve quick meals, typically featuring a limited menu of items like burgers, fries, and chicken. These establishments focus on speed and convenience, allowing customers to order and receive their food rapidly. Popular examples include McDonald's, Burger King, and KFC. Many fast-food chains operate on a franchise model, where individual owners can open locations under the brand's name. This system helps expand their reach and maintain consistency in food quality and service. Fast-food chains are often found in urban areas, near highways, and in shopping centers, catering to busy lifestyles.