I'd see a high probability it's for retargeting customers in ad-spend that Doordash itself uses. So what often happens is people have an interest in using Doord

I'd see a high probability it's for retargeting customers in ad-spend that Doordash itself uses. So what often happens is people have an interest in using Doordash, don't complete and then pay facebook to "retarget" the user to try and keep them top of mind until they complete the transaction.