You can ask poll questions to delegates attending different sessions that they can answer through your event app.
From the App section in your event, select the Poll Questions tab.
Firstly you must create a Poll.
Then each poll can contain many pages, these pages contain a number of questions. So create a poll and then create as many questions as is necessry.
Add the question and answer type eg. text answer, multiple choice answer etc.
Finally, go into the session in the program and select the specific Poll that should be displayed.
This question will now be available to be answered through the event app in the selected session.