Visa requirements refer to the specific conditions that travelers must meet to enter a foreign country. These requirements can include having a valid passport, completing a visa application, and providing supporting documents such as proof of accommodation or financial means. Each country has its own set of rules, which can vary based on the traveler's nationality and the purpose of the visit, such as tourism, business, or study. Before traveling, it is essential to check the visa requirements for the destination country. Some countries, like the United States, may require a visa for certain nationalities, while others, like the European Union, allow visa-free travel for short stays. Understanding these requirements helps ensure a smooth entry into the country.