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The Madison Avenue Field GuideA field guide to marketing & advertising, by Brandon Mina

GlossaryB2B & GrowthCase Study

B2B & Growth

Case Study

A detailed story of how a customer used a product to solve a problem and achieve measurable results, used as sales proof.

By Brandon MinaCEO, BrandPilot AIUpdated November 2026

Short answer

A case study is a detailed story of how a customer used a product to solve a problem and achieve measurable results, used as sales proof. It usually covers the challenge, the solution and the outcomes. Case studies build credibility because they show real-world results from a peer, which matters to cautious buyers.