Most courses at university level include group discussion sessions, usually called seminars or tutorials. Group discussion periods are also included in some practical classes.
Discussion is often misunderstood or undervalued as a way of learning.
As a result seminars or tutorials are not always used to their fullest potential. It is an essential and efficient learning opportunity. You are receiving information from several sources, not just from the tutor. Through discussion you can learn some things more thoroughly and effectively than by other methods. Asking questions is itself a way of learning, not an admission of ignorance.