A travel visa is an official document issued by a country's government that allows a foreigner to enter, stay, or leave that country for a specific purpose and duration. Visas can be required for various reasons, such as tourism, business, or study, and they often come with specific conditions that travelers must follow. To obtain a travel visa, individuals typically need to apply through the embassy or consulate of the destination country. The application process may involve submitting documents like a passport, photographs, and proof of travel plans. Each country has its own visa policies, so it's essential to check the requirements for the specific destination before planning a trip.