What is an H-1B visa?

The H-1B visa is a non-immigrant visa that allows companies in the United States to employ foreign workers in specialty occupations that require theoretical or technical expertise in specialized fields such as in IT, finance, accounting, architecture, engineering, mathematics, science, medicine, etc. It is one of the most common visa types for foreign workers in the U.S. due to its applicability to a wide range of professional occupations.