Modes relate to the method by which participants progress through quizzes.
Free Mode (classic): after answering a question, participants move on to the next one, even if they have answered incorrectly. They can display the correct answer.
Question by question (evaluation) mode: participants must answer the question correctly to advance to the next one. If they do not achieve the specified percentage, they must replay the question.
Question by question (controlled by the facilitator) mode: in meetings only, after answering a question, participants must wait for the facilitator to launch the next one in order to access it. This means that the group progresses at the same pace.