A business visa for the USA, such as the B-1 visa, allows foreign nationals to enter the country for short-term business activities, including attending meetings, negotiating contracts, participating in training sessions, or engaging in other professional activities. This visa typically permits stays of up to six months and does not allow for employment or receiving payment from a U.S. source. To apply, applicants must provide documentation demonstrating the purpose of their visit, such as an invitation letter from a U.S. company, travel itineraries, and evidence of financial capability to support themselves during their stay.