Comments and questions give you and others the ability to publicly discuss your Project and its stages. The reason for the difference between Comments and Questions is to allow the discussion to be more focussed. Often you will find that you would like to ask a Question about a Project, as opposed to just Commenting on it. If there is a Comment someone has placed on your Project, you can decide to move it to be a Question, or even delete it, if you don't think it is appropriate.
Links:
- Comments you have made