Visa Inc, commonly known as Visa, is nothing more than an American multinational financial services corporation from Foster City, California. Its purpose is to facilitate electronic funds transfers worldwide, mostly by using a Visa credit/debit card and gift cards. There is not one online casino in this world which doesn't accept Visa for deposits or cash out.
Tanzania is situated in East Africa, and is a popular destination for safari travel, as there is a good chance of seeing the "big five" animal species: buffalo, elephant, leopard, lion and rhino. Gambling here is overseen by the Gaming Board of Tanzania, and they are relatively liberal when it comes to online gambling by residents.