South Korea offers several work visa categories, including the E-series visas for professionals. Common types include E-2 for English teachers, E-7 for skilled professionals, E-3 for researchers, E-4 for technical instructors, E-9 for non-professional workers, and E-10 for seafarers. Each visa has specific eligibility criteria based on job role, qualifications, and industry. Choosing the correct visa category is essential, as each has different rules regarding duration, renewals, and job changes.