Trade policy involves a set of tools that governments use to manage the movement of goods across borders. Tariffs, essentially taxes on imported goods, are employed to control the number of foreign products entering a country. By increasing the cost of these goods, tariffs aim to make domestic products more competitive in the local market. Subsidies, on the other hand, are like a helping hand from the government to local industries. They provide financial support, enabling these industries to compete with imported goods more effectively.