Here you create a form with questions for the user to answer when booking. You get a question named description by default. To add a question you click the plus icon. A new window will open where you can select different types of questions to the left:
Types of questions
When you have added a question you can see settings for this question to the right. All types of questions have three similar tabs Question, Appearance and Advanced. Except for these settings you can make specific settings for each type of question.