When entering the country, the Vietnam transit visa is given to all the visitors by the Vietnam Immigration Department, and it is just one of those visas that are given to all foreigners who pay a visit to the country. The validity of the Vietnam e-visa for transit purpose is for 30 days with only a single entry and takes about 2-3 working days to process the visa. If you require the visa urgently, the representatives will also perform the rush processing method to provide you an e-visa according to your given time.
Transit visa is a short-period, temporary visa needed in some countries to stopover for a minimum of 24 hours in the country. If you are traveller who is about to stopover in Vietnam to get your destination flight, then you may need a transit visa.