McDonald's is primarily a service-based company. While they do offer products (such as hamburgers, fries, and drinks), McDonald's is fundamentally a fast-food restaurant chain that provides a range of food and beverages as a service to its customers.
When you visit a McDonald's restaurant, you engage in a service experience, where you place an order at the counter or through a kiosk, and the staff prepares and serves the food to you. The dining area, drive-thru, and even home delivery options are all part of the service-oriented experience that McDonald's provides.
It's important to note that the distinction between products and services can sometimes be blurred, as many businesses, including restaurants like McDonald's, offer both tangible products (food in this case) and intangible services (the dining experience, customer service, etc.). However, the core function and business model of McDonald's revolve around providing food services to its customers.