A visitor visa is a type of non-immigrant visa. It is issued by the Consulate or Embassy of a foreign country to a national of another country seeking to enter its borders on a temporary basis.

It allows for foreign nationals who have close family relationships with a citizen or lawful resident of the said country (e.g. UK) to become lawful permanent residents.

Yes. Your student visa application is incomplete without it. You are usually required to write IELTS or TOEFL. IELTS is also recognized for certain work permits.

A skills-based immigration program is a program specifically targeted at immigrant professionals. An immigrant professional with the right combination of education, skills and work experience would be eligible to gain lawful residence in a country in order to engage in skilled work.

Naturalization is a legal process whereby a non-citizen in a country acquires citizenship or nationality of that country.