Coupon codes can be used during the checkout process when purchasing a Premium Listing package or Promoting your page.
Simply proceed to the checkout page where you will be asked to input your business details and credit card information. Located at the top of the page is a coupon box section labelled "Have a coupon? Click here to enter your code."
Click this text and the coupon code input field will appear.
Enter your code and hit "Apply Coupon". This will update the payment details for your purchase.