Website actions: Purchases, sign-ups, and other actions that customers complete on your website. After paying via Online (Merchant/Non-Merchant) If failed mark as Website actions not completed.
If they paid then need to go thank you page and to Thank you page where we can add our tracking code get customer payment info via embed code shared with CJ+Google.

We are doing pay per sale affiliate marketing
Below $40 Sales per month: You’ll get $50 per sale
$50 + Sales per month: You’ll get $75 per sale
$200+ Sales per month: You’ll get $300/sale

So CJ * google needs to know the Purchases amount and more info.