Reference / Glossary / Measurement
Audience Overlap
The share of one audience that also belongs to another. Overlapping audiences in the same account bid against each other, inflate frequency, and corrupt A/B tests. Meta and most DSPs report overlap so it can be designed out.
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Cite this entry:
Agency Echelon. "Audience Overlap." Agency Echelon Reference, reviewed September 2026. https://agencyechelon.com/reference/glossary/audience-overlap/