Forum › White Hat SEO › PPC › Difference in optimizing for First Purchase and Purchases? › Reply To: Difference in optimizing for First Purchase and Purchases?
As you have set up a custom event for First Purchase, you can technically optimise towards that if you made a custom conversion out of it. If you optimise to the standard Purchase event, that it based on any Purchase (new or existing). But the main reason FB advocate to use that is because it will use ML from similar advertisers/brands that use that standard event, to be more accurate than any custom event.