Non-immigrant visas
Visa Classifications
Generally, a citizen of a foreign country who wishes to enter the United States must first obtain a visa, either a non-immigrant visa for temporary stays or an immigrant visa for permanent residence.
The "B" Visitor Visa is a non-immigrant visa for persons desiring to enter the United States temporarily for business (B-1) or temporarily for pleasure (B-2).
Persons planning to travel to the U.S. for a different purpose such as students, exchange visitors, temporary workers, journalists, etc., must apply for a visa under the appropriate category.
You can find more detailed information about non-immigrant visa types on the USCIS website and on the Department of State Consular Affairs’ Visa Types for Temporary Visitors webpage.