Applying for a green card through marriage allows a foreign spouse to obtain lawful permanent resident status in the United States by virtue of their marriage to a U.S. citizen or permanent resident. This process, also known as adjustment of status, grants the foreign spouse the right to live and work permanently in the U.S. and provides a path to eventual citizenship.
Marrying a U.S. citizen or permanent resident offers several benefits beyond the opportunity to live and work legally in the U.S. It allows the foreign spouse to travel freely to and from the U.S., access social security benefits, and petition for other family members to immigrate.