Visa requirements refer to the specific conditions that travelers must meet to enter a foreign country. These requirements can vary widely depending on the traveler's nationality, the destination country, and the purpose of the visit, such as tourism, business, or study. Common requirements may include a valid passport, a completed visa application form, and proof of sufficient funds for the duration of the stay. In many cases, travelers may also need to provide additional documentation, such as an invitation letter or travel itinerary. Some countries offer visa exemptions for certain nationalities, allowing them to enter without a visa for short stays. It is essential to check the specific visa requirements for your destination before planning your trip.