This activity is used for the persons reviewing the request to set it to rejected. The review process for the supplier request is used to make sure that suppliers are created in a systematic way and to avoid that duplicates or unwanted suppliers are added to the system. When rejecting the request it is possible to give a reject reason in a review comment.
As a result of this activity the status of the supplier request is set to Rejected and if you enter a review comment, that can be seen in the Review Comment field. A rejected request are locked for further updates, but can be deleted or re-opened.