Business Visa (B-1) is appropriate for activities such as

• Consult with business associates
  
  
• Attend a scientific, educational, professional or business convention, or a conference on specific dates
  
  
• Settle an estate
  
  
• Negotiating a contract
  
  
• Participate in short-term training
  
  

This is not an all-inclusive list. You can't get business visa to start conducting business in USA or help someone in family business. You are not allowed to work in US while on business visa. You may get paid salary from home country company while you stay in US on business visa, but you can not work under the supervision or under an American employer.

In addition to the documents required for visitors visa, business (B-1) visa seekers should also consider taking the following documents:

• Invitation letter from the US counterpart / Company with which you are going to conduct business.
  
  
• Letter from your employer or company that is sending you to the U.S.
  
  
• Exchanges of correspondence with U.S. purchasers, suppliers or contacts
  
  
• Recent contracts, bills of lading or other documentary evidence of recent imports and exports of purchases
  
  
• Any evidence of arrangements for lodging and appointments already made in the U.S. in preparation for your trip
  
  
• Incorporation documents and business license(s)
  
  
• Tax statements for the last 2 years
  
  
• Bank transaction statements detailing all deposits and withdrawals for the last six months. Include your personal and company accounts, along with evidence that you have authority to draw on the company accounts
  
  
• Any copies of recent advertising brochures or publications
  
  

The above are only suggested documents. It should be noted that a visa is not assured even if you have all these documents.