A B-1 or B-2 visa is the most popular type of visa for travelers entering the United States from a non-visa-exempt country. If you have a B-1 visa, then you’re approved to travel to the United States for business purposes. You can attend business or professional conferences or conventions, consult with business associates, negotiate contracts, purchase goods or materials, appear as a witness in court trials, and undertake independent research.
Travelers who enter the United States under the B-1 visa may not perform product work or accept paid or unpaid employment. It’s not a work visa: it’s a visa to temporarily visit the United States for work-related purposes.