A behavioral change support system is like a virtual coach that helps people change their behavior. It works by giving people advice and tips to help them learn how to make positive changes in their day-to-day lives. For example, if someone wants to quit smoking, the system might provide them with tips on how to stay motivated, what other activities they can do instead of smoking, and how to build a support system. The system might also remind them to attend counseling sessions or support groups. By giving people helpful advice, the system makes it easier for them to reach their goals and create positive changes in their behavior.