Fraud & Compliance
White List
An approved list of traffic sources or users allowed into a campaign.
A whitelist is an approved list of traffic sources, placements, sites, or users explicitly allowed into a campaign, with everything else excluded by default. It inverts the blacklist logic: instead of cutting bad inventory from a broad buy, you run exclusively on inventory already proven to perform. Whitelists also appear in compliance contexts — advertisers whitelisting specific affiliates for sensitive offers, or cloakers whitelisting reviewer IPs to show safe pages.
Buyers typically graduate campaigns from blacklist to whitelist mode: after a discovery phase burns budget mapping a network's inventory, the surviving profitable zones become a whitelist campaign with higher bids and stable ROI. Good whitelists are traded, rented, and guarded like assets. The catch is volume decay — whitelisted placements saturate and burn out, so without ongoing discovery campaigns feeding new zones, a whitelist quietly starves.
In buyer speech
“Move the sweeps offer to a white list campaign with the top 50 zones and bump bids 30% — discovery already ate enough budget.”