This is the 2246th most frequent Russian word.
заводе
"Заводе" is the prepositional case of "завод," meaning "factory" or "plant."
In this sentence, 'заводе' refers to a location where manufacturing occurs, in particular a factory.
На заводе производят автомобили.
At the factory, cars are manufactured.
Here, 'заводе' is used to indicate the workplace of the person, specifically a factory.
Он работает на заводе уже пять лет.
He has been working in the factory for five years.
In this context, 'заводе' denotes the specific location where the tour was held, emphasizing the factory setting.