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What Is Case Study?
Trust & Reputation
Updated 18 September 2026
Quick Answer
A case study is a detailed account of how a real customer used your product or service and the specific results they got — used as evidence to persuade potential customers considering the same decision.
Case Study vs. Testimonial — What's the Difference?
| Case Study | Testimonial | |
|---|---|---|
| Length & detail | A full story with specific numbers and process | A short quote or endorsement |
| Persuasive strength | Stronger — shows real process and outcome | Good supporting evidence, less detail |
Why It Matters
- Specific, real results are far more persuasive than general claims about what your business can do.
- It lets a hesitant prospect see themselves in a similar situation to a past customer who succeeded.
How It Works
- Pick a customer with a clear before-and-after result.
- Document the specific problem, what you did, and the measurable outcome.
- Use real numbers where possible — vague claims are far less persuasive than specifics.
Key Takeaways
- A case study documents a real customer's specific problem, process, and outcome.
- Specific numbers are far more persuasive than general claims.
- Always get explicit permission before publishing a customer's story.
Frequently Asked Questions
How long should a case study be?
Long enough to tell the real story with specifics, but focused — a page or two is usually enough for a small business.
Do I need permission from the customer?
Yes — always get explicit permission before publishing a customer's story or results, ideally in writing.
What if I don't have dramatic results to show?
A modest, honest result documented specifically is still more persuasive than a vague claim of a big one.