Using Tracking ID's With Hoplinks
A tracking ID (TID) is an alphanumeric string of up to 100 characters, including numbers, lowercase letters, and underscores, that you can add to the end of a HopLink.
Your tracking IDs are visible only to you as the affiliate, so the vendor you send customers to won’t be able to view your Tracking IDs. The format for a Tracking ID is:
When a customer follows a HopLink with a tracking ID, and when they purchase a product, the tracking ID is linked with those events. You can use tracking IDs to differentiate between different sources of traffic and compare your promotional methods.