A buzz group is a way of coping if a meeting is too large for you. In this situation it is better to divide the group into several small groups, of not more than 10 or 12 people. These are called buzz groups. You can then give each small buzz group a certain amount of time to discuss the problem. Then, the whole group comes together again and the reporters from the small groups report their findings and recommendations back to the entire audience. A buzz group is also something you can do after giving a lecture to a large number of people, so you get useful feedback.