The main responsibilities of a head of state typically include representing the nation in diplomatic matters, ensuring the functioning of government institutions, and upholding the constitution. Heads of state may also play a crucial role in setting national policy, especially in foreign affairs, and they often serve as the ceremonial figure embodying the national identity and unity. Depending on the governmental system, the head of state may have varying degrees of power, from largely symbolic to significant executive authority, influencing legislative processes and public governance.