Content.ad Publisher Domains are grouped into two separate Tiers. Domains in both tiers are continuously reviewed and monitored for traffic quality and performance.

Tier 1: Domains with a long-standing history of consistent, good quality traffic.

Tier 2: Generally smaller or new domains whose traffic may not match that of Tier 1.

CPC minimums are slightly higher for Tier 1 and lower for Tier 2.

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