While Spiffy does offer native integrations with Google Analytics and FB Pixel, we know that a lot of people do utilize custom tracking solutions and scripts.
Spiffy offers the ability for you to add custom tracking scripts to your individual checkouts from within the checkout editor’s settings.
NOTE: Adding custom tracking scripts to a Spiffy Checkout can affect performance, like slower loading times. Spiffy is unable to support performance issues caused by 3rd party tracking scripts, so use with caution.
Custom Tracking Scripts will need to be added to your checkouts individually. Navigate to a checkout’s editor, and click on the Settings tab in the sidebar.
After you have pasted in your tracking script, be sure to Publish the checkout to enable the change.