In many cases, you might want your advertising reporting metrics to include "leads" or "form submissions" generated by Privy. This integration will allow you to track contacts that visit your site from a Facebook ad and then signup on a Privy form from within your Facebook Advertising analytics.
This assumes you already have the proper facebook pixel installed on your site, likely tracking checkout conversions.
If so you would add the following code in Privy:
<script>
fbq('track', 'Lead');
</script>
To do that, navigate to "Customizations".
Then paste that into the conversion pixel box as shown here. Then don't forget to click save!
Once complete, Privy will fire the pixel after every new form submission. And inside your FB advertising dashboard, you should begin to see lead counts increment (it may take 24 hours to show on Facebook's side)