You can trigger a conversion for a contact in an automation by using the "Convert" automation action.
With this action, you can choose an existing conversion or create a new one. Learn how to set up a conversion in ActiveCampaign.
The "Goals" automation action can also trigger a conversion. This conversion will occur for any contact in the automation who achieves the goal's conditions. With this option, you can choose an existing conversion, create a new conversion, or no conversion at all.
Goal actions with conversions will have a checkmark with “Trigger conversion: (name of the conversion).” This will appear at the bottom of the goal action: