B1 is a type of non-immigrant business visa where the applicant would participate in activities that are commercial or professional in nature.
These activities may include negotiating a contract, taking short term training classes, selling a property, participating in a convention that is science related or business related or workshops involving a professional training.
B1 is a type of visa which allows a person both to be a visitor & to do business. This type of visa does not allow one to buy a business & to start collecting money from it.
This visa does not grant work permission & does not allow running a business.
US visas involve many complex details, to ensure proper application & correct submission contact an attorney.