Differences between webinar and a zoom meeting are:
– it has participants, host/cohost, and speakers, wich can do everything, as share screen, answer questions, activate camera, microphone, etc.
– speakers can not activate camera or microfone. This needs host/cohost autorization.
– it has a Q&A system where the speaker can answer at the moment, or answer by writing. The questions can be done anonimously. If you prefer do the question by voice, you must ask the host/cohost permission, by chat, to activate your microphone.