What are custom conversions?
Custom Conversions allow you to track and optimize for conversions without adding anything to the Facebook pixel code that is already on your site.

Custom Conversions
Action Steps
- Go to the Custom Conversions page in Ads Manager.
- Click Create Custom Conversion.
- Add the URL, or part of the URL, that represents your custom conversion.
- Select an event (standard or custom), then choose a parameter.
- Select a category and click Next.
- Give your custom conversion a name.
- Click Create > Done.