Employment-based visas are special permits that allow foreign nationals to work in a country. These visas are typically sponsored by an employer who wants to hire a foreign worker for a specific job. The process often requires the employer to demonstrate that there are no qualified local candidates for the position. There are various types of employment-based visas, each with its own eligibility criteria and application process. For example, in the United States, the H-1B visa is popular for skilled workers in specialized fields, while the L-1 visa is designed for employees transferring within a company.