The Q&A pod can be used to offer students a space to ask questions to the host and/or presenters. The question can then be answered privately to the student who asked, or can be answered by sharing both the question and answer with the entire group so all can see both.
The host can also "assign" questions to a presenter. If you imagine a large class that has TAs, this could be a way for the host to pass questions along for others to answer for students. For our purposes, a host could make a student a "presenter" and then assign the questions to them to be answered.