An ambassador's main duty is to represent his country and its interests in a foreign land. Ambassadors live and work in the foreign country in which they represent the interests of their government and people. The requirements to become an ambassador vary across countries. However, experience and familiarity with the foreign country's policies and culture is necessary.
To fit in and work effectively and efficiently, an ambassador must quickly adopt and adapt to the practices, norms and cultures of the country to which he is posted. Undergraduate and advanced degrees are common qualifications for ambassadors. Those with experiences working in government departments or in political offices have higher chances of serving as ambassadors. Ambassadors are nominated by the president, and then the Senate rejects or approves them into their offices. Besides serving in foreign countries, ambassadors are also sent to organizations like the United Nations, World Bank or semi-autonomous cities like the Vatican. Ambassadors to such organizations report to their governments on a regular basis and recommend to their government the right course of action regarding policies and activities. For example, an ambassador to the U.N. may recommend to the government to support or finance a specific U.N. activity that benefits the country or humanity in general.