Pixel Retargeting is retargeting based on browser or event data collected by a tracking pixel.
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 browser-based tracking setup records an eligible product-page visit and passes the event to an advertising platform. Test that the correct event fires and that audience collection respects the site’s configured consent and tracking controls.