Collaborative meetings allow your attendees to vote on the topics they find most valuable. You can set the number of votes they get. If you are running a big meeting that will have many topics, you may want to give them more voting "currency". For smaller meetings, fewer votes is usually better.
You can set the number of votes when you create a Collaborative meeting. You can change the number at any time by editing meeting properties.
Edit the "# of votes per attendee".