How is this different from web conferencing?

With web conferencing, interaction between participants takes place in real-time. However, it is not always possible or desirable for the people you need to reach to be available at a specific time, particularly when you have a global audience in multiple time zones, or when taking time away from your employees’ core tasks is not desired. Brainshark is specifically designed for asynchronous communication and collaboration. Each participant can create or access content at his or her convenience.