When discussing Government's purpose , providing Public services refers to creating collection of services organized by the government which funded by the Tax payment given by the citizens. Public services were not created to obtain profit, and can be used by all people as long as those people can prove that they're a legal citizens in that country.
United States have a wide variety of public services. Example of public services that are most commonly used are: Public transportation, maintenance of public infrastructure, Public library, Welfare, etc.
