A visa policy is a set of rules and regulations that a country establishes to control the entry of foreign nationals. It outlines the requirements for obtaining a visa, which is an official document allowing individuals to enter, stay, or work in that country. Visa policies can vary significantly between countries, depending on factors like diplomatic relations, security concerns, and economic needs. Countries may have different types of visas, such as tourist, student, or work visas, each with specific criteria. For example, the United States has a diverse visa policy that includes the B-2 tourist visa and the H-1B work visa. Understanding a country's visa policy is essential for travelers and expatriates planning to visit or relocate.