Heads of state are the highest-ranking officials in a country, often serving as the symbolic leader and representative of the nation. They may hold titles such as president, monarch, or prime minister, depending on the country's political system. Their roles can vary widely, from having significant powers in presidential systems to more ceremonial duties in constitutional monarchies. These leaders are responsible for upholding the constitution, making key decisions, and representing their country in international affairs. They often work alongside other government officials, such as cabinet members and legislators, to implement policies and address national issues.