Imports are goods that were made in one country and is coming into a different country to be sold. Exports are goods that were made in one country and is being sent out to be sold into another country. Think of imports as in-coming goods, and exports as out-going goods. Make sense? Also, tariffs are kind of like taxes. People place tariffs (taxes) on people who want to sell their goods in a different country. Basically, people who want to sell their products in another country have to pay the government in order to be free to sell their products. That is what a tariff does.
Does a tariff (tax) on imports (in-coming goods) also reduce exports (out-going goods)? It will. Here’s how. If you put a tariff on imports, there is likely to be lower imports, causing lower exports. Tariffs could potentially hurt exporters by making the exported products more expensive. The exporters could struggle to maintain their sales, or be forced to cut the prices of their goods. This causes profits to fall, and this could affect the exporters’ country’s economy.
Tariffs can also increase the cost of goods and services from an importing country. This causes higher prices, causing a decrease in the consumer’s demands for that commodity. This creates a surplus in the exporting country. All of this causing a decrease in the exporting country’s export volume.
There are many other reasons why tariffs on imports reduce exports, I just mentioned some simple to understand ones.