This is where you define the Comment visibility settings. Allowing you define the Project Role than can see the comment and if Agent comments should be Private or Public.
This is the project Role/Group that Comments will be restricted to. Only users with this Project Role/Group will be able to view the comment.
These options only apply to Service Desk projects. Please refer to Commenting on Service Management issues using JEMH for an explanation on Jira Service Management user commenting behaviour.
The visibility of comments created by Agent. Current options are:
Public
Private
The visibility of comments created by Collaborators (any user with application access). Current Options are:
Public
Private
Adds uninvolved Senders as Request Participants. Requires Profile > Security > External Customer Comments Enabled to be enabled.