Plate Service is a basic service style in a restaurant in which fully cooked menu items are individually portioned, plated (put on plates) in the kitchen, and carried to each guest directly.
"Plate Service" in the context of travel, transport, and hotels generally refers to the service of providing food and drinks on a plate, typically for consumption on-site.
In the context of hotels, "Plate Service" might refer to the service of providing meals in a restaurant or dining facility on the hotel property. For example, a hotel might advertise that it has a "Plate Service" restaurant, which would indicate that they serve meals to customers on plates rather than in a buffet or cafeteria-style setting.
In the context of transportation, "Plate Service" may refer to a service of providing meals to passengers during a flight, train, or bus trip. For example, an airline might offer a "Plate Service" meal option for passengers, which would include a hot meal served on a plate.
In the context of tours, "Plate Service" may refer to the service of providing meals to tour participants during the tour. For example, a tour operator might offer "Plate Service" meals, which would include meals served on plates rather than in a buffet or cafeteria-style setting.
These are some examples, but again, the context may provide different meaning to the word.
See also --->Table Service.