What is the primary function of terminal areas in an airport?

The primary function of terminal areas in an airport is to serve as the main passenger structure. This space is dedicated to facilitating the needs of passengers, from check-in and security screening to boarding and arrivals. The terminal provides essential services and amenities such as ticketing, baggage claim, waiting areas, and food and retail options that enhance the travel experience.

While other functions such as air traffic control, security checks, and cargo operations are vital components of airport operations, they are not the primary role of the terminal areas. Air traffic control is typically managed in a different facility, security checks are a component of the passenger experience within the terminal but not the terminal's primary function, and cargo operations are usually handled in designated areas separate from passenger terminals. Thus, the terminal area stands out primarily as the hub for passenger activities within an airport.