Suppression Audience is an audience intentionally excluded from campaigns, often customers, employees, or recent converters.
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 company can suppress recent purchasers from ads urging them to make the same initial purchase. The suppression source needs timely updates; an outdated customer list may continue to expose buyers to an irrelevant message.