A B-1 visa allows you to attend conferences, seminars and trainings; as well as meet with clients and providers and sign contracts, provided that the company you work for in you country of residence sponsors your stay. It is illegal to receive payment from an American company while on a B-1 visa.
If you want to know more about the activities you can do while on a B-1 visa, check our blog.
For more information about B-1 visas and its uses, take a look here.