Final answer:
The WTO aims to reduce tariffs and other trade barriers through negotiations like the Doha Round, fostering international trade and potentially adding significant value to the global economy.
Step-by-step explanation:
The World Trade Organization (WTO) does not ensure that countries enforce tariffs on imports and exports; rather, it works toward reducing barriers to international trade. Governments traditionally place tariffs on imported goods to protect sensitive industries, for humanitarian purposes, or to guard against dumping. The WTO serves as a forum for member nations to come together and negotiate agreements that aim to lower these trade barriers, a process that is beneficial to the world economy.
These negotiations often take place in 'rounds,' such as the current Doha Round, launched in Doha, Qatar. Reductions in tariffs and other trade barriers through WTO negotiations can have significant economic benefits, potentially adding up to hundreds of billions to the global economy annually by facilitating greater market access and agricultural subsidy reforms.