A prime minister is the head of government in a parliamentary system, responsible for running the country and making important decisions. They are usually the leader of the political party that has the most seats in the parliament. Prime ministers work with other government officials to create and implement laws and policies. In many countries, prime ministers are appointed by the monarch or elected by the parliament. They represent their country in international affairs and often lead discussions on issues like the economy, education, and healthcare. The role of a prime minister can vary depending on the country's specific political system.