Track New vs. Existing vs. Prospective Customers in GA4 with Facebook Ads

To track purchases by customer type in GA4 for Facebook Ad campaigns, follow these steps:

1. New Customers: Assign a custom value to new customers, such as 'new_customer'.
2. Prospects: Use a custom value for prospects, individuals who have shown interest but haven't made a purchase. Instead of the term 'engaged customers', you can use 'engaged_prospect'.
3. Existing Customers: Identify existing customers with a custom value like 'existing_customer'.

Add these custom values as parameters to your ad's destination URL in the format 'audience={{audiencetype}}'. This allows you to dynamically load and track the audience type in GA4, enabling you to analyze performance by each segment.

The custom parameter 'audience={{audiencetype}}' in Facebook ads serves to dynamically identify and load the type of audience interacting with your ad. By mapping 'new_customer', 'engaged_prospect', or 'existing_customer' to this parameter, you can segment and breakdown your ad performance results in Google Analytics 4 based on these distinct audience types, giving you more detailed insights into your campaign's effectiveness.

Before adding custom audience parameters to your Facebook ads for tracking in GA4, you need to:

• Define Audience Segments: Create custom audiences in your Facebook ad account settings to represent the different segments such as 'new customers', 'engaged prospects', and 'existing customers'.

• Map Custom Values: Assign the custom values to the URL parameter 'audience={{audiencetype}}' for your ad's destination link.

Meta's system will then check if a person is part of these defined audience types during ad interactions and categorize them accordingly for tracking in GA4.