The Reviewer is a subject matter expert (SME) responsible for assessing and commenting on assets under development. As a Reviewer, you can list assets assigned to you for the review and comment, endorse or dismiss them individually. Each of the assets offer you the Comment, Recommend for Approval and Request Change buttons. When pressing the buttons, you can explain the decision in a comment.
The Request Change action sends the asset back to Draft. The Editor is responsible for implementing requested changes or providing clarifications and re-submitting the asset for review again. The review is an iterative activity.