A passport is an official government-issued document that certifies a person’s identity and nationality for international travel. It allows the holder to enter, exit, and move between countries legally. A passport contains personal details such as name, date of birth, photograph, passport number, and nationality. It also includes visas and immigration stamps that record travel history. Passports help ensure security, verify citizenship, and provide protection to citizens abroad through their country’s embassies. They are valid for a limited period and must be renewed before expiry to continue international travel.