On Process posts, the process participants can comment for discussions, share files, and use the Good feature to endorse a process. Commenting can be used to discuss progress of the process, clarify the document-end goals, and more. Within the comments, a paperclip icon allows users to attach any relevant or additional resources to the process post.
Comments can generate more ideas, provide more effective communication, and also users not involved in the process can be tagged with the @ symbol followed by their email to join the process post as a viewer. Comments is an easy way to communicate with process participants and other users outside of the process can also view a process they are not involved in.