An America visa is any type of visa that gives a non-citizen access to the United States for a variety of different purposes and durations of time. The US government allows a variety of different types of visas for a variety of different purposes, and though there is a cap on each type every year, there are many given out. America visas usually start off on a temporary basis but can be extended and can ultimately turn into a permanent residency type of application that can lead to US citizenship. When applying for a visa into the USA, it's important to fulfill all of the criteria, fill out all of the paperwork, and indicate the purpose, intent, and duration of your stay clearly and honestly. Failure to do so or to stay beyond your approved duration can result in immediate voidance of the visa granted.