Ensure you have enabled Enhanced Ecommerce Reporting in your Google Analytics account.
You can enable this in the Admin section under View > Ecommerce Settings. Follow these instructions for more detail.
To add Google Analytics or Meta (Facebook) Pixel for each individual event, select Integration from the left-side menu.
If you are just adding general Google Analytics or Meta (Facebook) Pixels, choose preferences.
Enter your Google Tracking ID and Meta (Facebook) Pixel ID.
Click Save. You will now be able to track visitors to your Eventfinda listing through Facebook and Google.