Fast food refers to food that is prepared and served quickly, often at restaurants or drive-thrus. It typically includes items like burgers, fries, and pizza, which are designed for convenience and speed. Many fast-food chains, such as McDonald's and Burger King, offer standardized menus that can be found in various locations around the world. The fast-food industry has grown significantly since the mid-20th century, catering to busy lifestyles and providing affordable meal options. While it is popular for its quick service, fast food is often criticized for being high in calories, fats, and sugars, which can contribute to health issues when consumed frequently.