What is the primary difference between a visa and a green card?

The primary difference between a visa and a green card lies in the nature of residency they grant to a foreign national in the United States. A visa is typically a temporary permission that allows an individual to enter the U.S. for a specific purpose, such as tourism, business, or studying. It stipulates a limited period during which the visa holder may reside in the country. In contrast, a green card, officially known as a Permanent Resident Card, confers the status of permanent residency to its holder. This means that a green card allows an individual to live and work in the United States indefinitely, provided they maintain their residency status and comply with immigration laws.

Understanding this distinction clarifies why a green card represents a more stable and long-term immigration status compared to a visa, which is often tied to specific conditions and durations.