You did everything right. You asked at the right moment, made it easy, and the customer came through. Then you read what they sent: "Great product, excellent service, highly recommend!" It's kind. It's positive. And it does almost nothing to convince the next buyer. Vague testimonials are the most common outcome of a successful ask, and most businesses either publish them as-is or quietly discard them. Both are mistakes. The fix is to treat a vague testimonial as a first draft, not a final answer.
Here's how to turn "great service" into proof that actually moves people.
Understand Why Vague Testimonials Fail
A generic testimonial fails for one reason: it could have been written about anyone. "Highly recommend" is a sentence the reader has seen ten thousand times, attached to products they didn't buy. It carries no information, so the brain files it as noise. What persuades is specificity — a concrete before, a concrete after, and a detail only a real customer would know.
That's the bar every testimonial should clear: could a competitor's customer have written this exact sentence? If yes, it's too vague to work. Your job is to help the customer surface the specific thing they already experienced but didn't think to mention.
Never Rewrite It Yourself From Scratch
Before the fixes, one hard rule: you do not invent details. Putting words in a customer's mouth — inventing a metric, a scenario, or a feeling they never expressed — is fabrication, and it will eventually cost you far more than a weak testimonial ever could. If a customer later sees a "quote" they never said, or a prospect asks about a number that isn't real, the damage is permanent.
Everything below is about drawing out specifics the customer actually has, not manufacturing them. The customer always approves the final wording. For more on why authenticity is non-negotiable, see how to verify testimonial authenticity.
Go Back With One Specific Question
The fastest fix is a short, friendly reply that asks for exactly one concrete detail. The mistake is asking "could you make it more specific?" — that hands the work back to the customer without helping. Instead, ask a pointed question that's easy to answer:
- "What was the problem before you started using us?" — This surfaces the before state, which is often the most persuasive half of any testimonial.
- "What's one thing that's easier or faster now?" — This surfaces a concrete after.
- "Is there a moment or result that stands out?" — This invites a specific story instead of a summary.
You'll often get a reply like: "Honestly, we used to spend two hours every Friday reconciling invoices by hand, and now it takes ten minutes." That single sentence is worth more than a paragraph of praise, and it was sitting right there — the customer just didn't think it counted.
Offer to Draft From Their Own Words
If the customer is busy or not a natural writer, offer to assemble a draft from what they've told you — the call notes, the support thread, the reply they just sent. This isn't inventing; it's editing their raw material into a clean quote and sending it back for approval.
The framing that works: "Based on what you mentioned about cutting reconciliation from two hours to ten minutes, here's a version you could use — feel free to change anything or tell me it's off." Most customers will approve a draft built from their own words in one reply, and many will improve it with a detail you couldn't have known. Because every fact came from them and they sign off on the final text, it stays honest. For a repeatable way to gather those raw details up front, see how to turn a support conversation into a testimonial.
Trim, Don't Inflate
Sometimes the customer's raw reply already contains a great specific detail buried inside filler. In that case your job is to cut, not add. "Great team, really helpful, and the thing I loved most was that it cut our reconciliation time from two hours to ten minutes, would recommend to anyone" becomes: "It cut our reconciliation time from two hours to ten minutes." Lead with the specific, drop the generic wrapper. Editing for length and focus is fair game as long as you don't change the meaning — for where that line sits, see should you edit a testimonial for length or grammar.
When to Just Let It Go
Not every vague testimonial is salvageable, and that's fine. If a customer gives you a generic line and doesn't respond to one gentle follow-up, don't push. A single thin testimonial isn't worth straining a good relationship. Keep it on file if you like, but spend your energy on the customers who have a specific story to tell. One vivid, concrete testimonial does more work than five that all say "highly recommend."
The Takeaway
A vague testimonial isn't a failure — it's raw material. The customer had a specific experience; they just summarized it away. Your task is to ask one pointed question, help them surface the concrete before-and-after, and shape it into a clean quote they approve. Never invent the details, always let them sign off, and you'll turn "great service" into the kind of proof that actually converts.