H 1B visa is the most important work visa in the United States. It is a non-immigrant visa issued to employees with foreign nationality and professional skills employed by American companies. H 1B visa holders can work in the United States for three years, which can be extended for another three years. After the expiration of six years, visa holders must leave the United States if their status has not changed.
H 1B applicants who exceed a certain amount must draw lots. If they don't win, then
Either leave the United States or change to an identity that can stay in the United States.