How do tariffs work to protect a nation's industry and goods manufacturing?

Well, it helps us get more money. A tariff is a tax on an imported good and therefore, it gives the U.S. money.

Tariffs levy a tax on any product or service coming into the nation. It helps industry by reducing the national market's competition with the international market's. People will most want to buy cheap items without the tariff from the nation rather than get it from another country.