Visas are categorized based on the purpose of travel and duration of stay, including:
- Single-Entry Visa: Allows entry into a country only once during the validity period.
- Multiple-Entry Visa: Permits multiple entries within a specified period, ideal for frequent travelers.
- Short-Term Visa: Issued for tourism, business visits, or short-term studies, usually valid for a few weeks to months.
- Long-Term Visa: Suitable for work, study, or family reunification, often leading to residency options.