Sounds like you are looking at Playtech Stats?
If you’re looking to measure the quality of your traffic I’d say that a good indicator would be clicks to real players…. understanding that the terminology differs from program to program.
Depending on what specifically we’re looking at with an affiliate we’ll look at a combination of clicks to registrations and registrations to new accounts (often look at this one to evaluate the quality of the traffic that the affiliates are sending through as well as operators’ ability to convert the registrations to new accounts).