Nigeria, Nov. 18 -- The terms visa-free, visa, visa-on-arrival, and e-visa countries refer to the different types of travel permissions or entry requirements for international travelers. Here's the breakdown:

1. Visa-free Countries

Definition: Countries where you do not need a visa to enter for a specified period of stay.

Requirements: Travelers can enter these countries with just their passport and do not need to apply for a visa before traveling. However, there may still be requirements such as proof of onward travel or a return ticket.

Example: Citizens of the United States or European Union may travel to some countries in the Caribbean or Europe without needing a visa.

2. Visa Countries

Definition: Countries where you must apply...