All participants who work in your distributed loop are in a list in the leader panel. When you click the name of a specific person you will see how far s/he has progressed in the loop and which tasks are completed. As a leader you can choose to approve a task, give feedback or both if that is what you wish. When you provide feedback your participant will receive a pink notification that will show her/him that you have written something. If you approve the task, your participant will see a green check symbol on the node you have approved in her/his loop. When you provide your feedback you can use the media you like best: text, sound or film. You can also embed material in your comments, just like when you build loops.