Concept 1: A product is anything that can be offered to the market, used and consumed by people, and satisfies a need, including tangible items, intangible services, organizations, ideas, or combinations of them. The dishes on the menu belong to the item, which is the product.

Concept 2: service is a paid or unpaid activity to do something for others and to make others benefit from it. Not in kind but in the form of providing live labor to meet a particular need of others. The waiter is.