As an event admin or collaborator, you can mark irrelevant audience questions "off-topic".

Marking a question off-topic is a respectful way to deprioritize audience questions that are not relevant to the discussion.

Off-topic questions are pushed to the bottom of the Q&A list and upvoting is disabled on such questions.

To mark a question off-topic click on the "Mark off-topic" button in the drop-down menu -