As Tom suggested, it will best if you contact us directly. But I will reply to here as it might help others.
After the price match request is approved by the administrator, a discount with the price difference percentage is generated by the system and it is sent to the customer with a short message ( which can be changed as it is a message template ). Then the customer has to add the product to the cart and use the system-generated discount in the discount box in the cart.
Hope this helps!
If you have any further questions, please do not hesitate to ask!