An H-1B visa is a non-immigrant visa that allows U.S. employers to hire foreign workers in specialty occupations requiring theoretical or technical expertise. These positions often include fields like information technology, engineering, healthcare, and finance. The H-1B visa is initially granted for up to three years and can be extended to a maximum of six years. Applicants must have at least a bachelor’s degree or equivalent in the relevant field. The visa process is subject to an annual cap, with exceptions for certain employers, such as universities or nonprofit research organizations.