The most favoured nation (MFN) clause is a status granted by one country to another to ensure non-discriminatory trade. Countries with MFN status receive reduced tariffs and cannot be discriminated against in trade. The MFN status prevents preferential treatment to certain countries and guarantees equal trade terms. It is an important principle governed by the World Trade Organization that covers trade in goods, services, and intellectual property rights. While MFN aims to promote fair trade, exceptions are made to support developing countries through systems like the Generalized System of Preferences.