Its continuously growing faster and faster, which means if you are working here and earned money it will become more valuable then any of the currency across the world.
Receiving US visa is very difficult but if you are looking for a safe environment as well as your living standard is better then you have to apply for this visa.
When a person or national are going in another country for the purpose of touring and adventures this is called tourist and the document he needs that is called tourist visa.
This permit types gives almost all country across the world. In this permit you are free to move in that country for the travel purpose.
The first one is immigrant visa and the second one is Non-Immigrant visa. So we are going to travel in the USA that's why we choose the second one visas which is Non-Immigrant visa.
In Non-Immigrant visa US offers basically two types these are : B1 and B2 visa but there is another type which is for both purpose and this visa is called (B-1/B-2).