@Ciara Dependent, tariffs on similar items, such as cars, allow for domestic manufacturers to sale their product at a lower rate than foreign groups, and increase the number of jobs in the domestic market. It can also help counter 'dumping', the act of selling goods at a cheap rate from foreign markets (usually developed by low wage workers and other cut corners), cause the domestic business to go broke and then charge a higher price with a de facto monopoly. This is how the Detroit steel industry collapsed with Chinese steel.
However, it can have the negative impact as the quality control can drop.