Hi @JDoubleFizzle ,
Thank you for writing in!
Fulfilled Order is an event recorded into Klaviyo when your e-commerce store marks the order as Fulfilled. Depending on your e-commerce store, you can find the definition in our help center documentation.
Here’s the definition for Fulfilled Order in Shopify - https://help.klaviyo.com/hc/en-us/articles/115005080447-Reviewing-Your-Shopify-Data#fulfilled-order5
If you are specifically referring to the campaigns overview, I would recommend using the “Placed Order” event instead of the “Fulfilled Order” event to get a true number of customers who purchased after opening or clicking your campaign.
If you do use the “Fulfilled Order” event in your campaigns overview, it will be the number of people who opened or clicked your campaign and then Fulfilled their Order.
Klaviyo uses a last touch revenue attribution model and you can read about it here.
Happy Sending!
Best,