View-Through Conversion is a conversion credited after a user saw an ad but did not click it before converting.
It matters because most visitors do not convert on the first visit. Retargeting terminology helps teams create thoughtful follow-up sequences, avoid wasted impressions, and respect audience exclusions and privacy expectations.
Example
A person sees an ad, does not click it and later completes a measured purchase. A platform may report a view-through conversion when its rules match those events; that attribution does not by itself prove the impression caused the purchase.