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Glossary · Bidding & Delivery

Ad Relevance Diagnostics

Three ranking signals Meta shows (quality, engagement rate, conversion rate) that compare an ad against competitors targeting the same audience.

Ad Relevance Diagnostics break down into Quality Ranking, Engagement Rate Ranking, and Conversion Rate Ranking, each comparing an ad's performance against other ads competing for the same audience. A 'below average' rating on any of the three signals a specific weak point — poor creative quality, low interaction, or a landing page or offer that underconverts relative to competitors.

These diagnostics are most useful for troubleshooting underperforming ads rather than predicting winners in advance, since they only populate after an ad has accumulated enough auction data, but they're often the fastest way to tell whether a rising CPA problem is a creative issue or a post-click issue.

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