What is it?
Nonimmigrant visas are issued to foreign nationals visiting the United States for a short period of time for tourism, business, education, medical treatment, or petition-based employment. The type or class of nonimmigrant visa required depends on your purpose of travel.
What does it mean?
Below is an illustrated guide from the U.S. Department of State website on how to read and understand your visa. If you were issued a nonimmigrant visa, be sure to check that the information printed on your visa is correct. If any of the information on your visa does not match the information in your passport, please return your passport with the US visa to the Nonimmigrant Visa Unit through any 2GO courier branch and include a letter that clearly states the error.
What does it guarantee?
A visa does not guarantee entry into the United States. Visa holders apply for admission to the U.S. at the point of entry and are subject to inspection there by officials of the Department of Homeland Security US Customs and Border Protection (CBP) who have the authority to allow or deny anyone admission to the United States.