You can create your own Referral URLs in order to gain a commission by promoting certain products specifically.
For example: If you want to create a custom link for Godox AD200 Pro
Website page link:https://www.pergear.com/collections/godox/products/godox-ad200pro
Your referral URL would have to add your parameters in the end of website page link.
How to get your parameters?
Step1: Click the "Referral URLs" option in the navigation list on the left.
Step2: Find your parameters ( in the blue Square) from your original referral URL.