A fast food chain is a type of restaurant that serves quick, convenient meals, often with a focus on speed and efficiency. These establishments typically offer a limited menu of items such as burgers, fries, and soft drinks, allowing for rapid preparation and service. Popular examples include McDonald's, Burger King, and KFC. Fast food chains are known for their standardized recipes and processes, ensuring that customers receive a consistent experience regardless of location. Many chains also provide drive-thru services, making it easy for customers to order and pick up food without leaving their vehicles.