Student visa is a kind of official document issued to students to help them enter different countries and pursue education. It is a type of non-immigrant visa and any prospective student who wants to pursue higher education in another country should get a student visa for that country. A student visa is a must to study aboard.
The eligibility conditions of student visa differ from countries to countries. Besides, the same country may set slightly different set of eligibility conditions for different nations. Your course of study and the type of school you plan to attend determine the exact type of visa you need. Besides, it needs to be approved by your academic institution abroad.