Customers can review products via a 1-5 rating, add their own text, and add effects. These will show on your menu for other customers to see; you have control over what gets posted by being able to approve/reject reviews.
Dispense sends out an email requesting a review post-purchase.
To enable/disable Reviews
Navigate to Store > Settings > Products
Scroll down to 'Enable Product Reviews'
To Approve / Reject Reviews
Navigate to Menu > Reviews
You will see any Pending Reviews
Select the review to see the details as well as approve or reject it.