To list out all reviews of all products, Go to Reviews
In Reviews, you will see the first two options to display all reviews.
1. All reviews listing.
All reviews of the entire store will be displayed over here.
To perform an action on each review click on Action button else on + Button.
Admin can edit, approve, disapprove as well as delete any review.
Admin can also give Reply on Review given by customers like the below image.
2. Product vise all review listing.
When you click on "Products By Reviews" Tab below page will be displayed.
Click On View Reviews Button to see all reviews of a specific product. Admin can edit, approve, disapprove as well as delete any review from that page.