Editors can rate the quality of your reviews on a four-point scale, across four dimensions, as shown in the form below:
You can request the editor to provide you with feedback on the review progress page of the review in question. Find the review on your Review Records page and then click on your review's 'progress' column to get to the Review Progression Page. Here scroll down to feedback:
Enter your editor's name and email address and then hit 'invite' to send the request for feedback.