The U.S. Citizenship and Immigration Services (USCIS) is a government agency under the Department of Homeland Security. It is responsible for overseeing lawful immigration to the United States. USCIS processes applications for various immigration benefits, including green cards, citizenship, and work permits. USCIS also manages programs that support refugees and asylum seekers. The agency aims to ensure that immigration processes are fair and efficient, providing resources and information to help individuals navigate the system. Through its services, USCIS plays a crucial role in shaping the nation's immigration landscape.