The comments section of each campaign page is an area where the campaigner can answer common and recurring questions they receive from backers and potential backers of their campaign. You can include the common questions within the campaign description so backers are not asking questions relatively.
Backers can always directly message the campaigner or post a comment to ask questions about the campaign or rewards. If a campaigner notices that particular question keeps being asked, or they notice a common area of confusion, they can choose to create a FAQ section with these questions included in their campaign description. From there, a campaigner can add a new question and the corresponding answer.
If you are a campaigner receiving questions related to using the Fundigo platform itself, you can always encourage your backers to contact us directly.