A fast-food chain is a type of restaurant that serves quick, convenient meals, often with a limited menu. These establishments focus on speed and efficiency, allowing customers to order and receive their food rapidly. Popular items typically include burgers, fries, and soft drinks, and many chains offer drive-thru services for added convenience. Fast-food chains are often part of larger franchises, meaning they have multiple locations under the same brand. Examples of well-known fast-food chains include McDonald's, Burger King, and KFC. These restaurants are designed to cater to busy lifestyles, making them a popular choice for many people.