Guides
Voice of customer research for ads.
Voice of customer research means collecting the exact words customers use about their problem and putting those words in your ads. Read 1-3 star competitor reviews, Reddit threads, comments under ads and your support inbox. Sort what you find into pains, objections, desired outcomes and failed alternatives, then turn one line into one hook.
What is voice of customer research?
It is research where the output is quotes, not charts. Instead of asking "what do customers think?", you collect how they say it. The best ad copy is often written by angry customers: their words are specific, emotional and already in the language your audience uses.
It is also the fastest way to find new ad angles. A product sheet gives you features. Reviews give you the reasons people buy and the reasons they don't.
Where should you look?
| Source | What you find there | How to search |
|---|---|---|
| Competitor reviews, 1-3 stars | Disappointments, broken promises, failed alternatives | Amazon, Google, Trustpilot or the competitor's own product pages, filtered to low ratings |
| Reddit and forums | Honest comparisons and doubts before buying | Search "[category] worth it", "[brand] vs", "[problem] anyone else" |
| Comments under competitors' ads | Objections and jokes, what people don't believe | Find the ads in the Meta Ad Library or TikTok Creative Center, open the comments |
| Your support inbox | Questions before purchase, reasons for returns | Export the last 3 months, search for "before I buy", "does it", "return" |
| Your own 5-star reviews | The outcome people actually got, in their words | Look for phrases that repeat across reviews |
What exactly should you copy?
The exact words, not your summary of them. Paraphrasing removes the part that makes people stop.
- "I gave up after 2 weeks" beats "lack of consistency".
- "My bathroom shelf is a graveyard of serums" beats "product fatigue".
- "I'm embarrassed to invite people over" beats "low confidence in home decor".
Copy the line, the source and the star rating into one sheet. Keep spelling and slang as they are.
How do you sort what you find?
Put every quote into one of four buckets. After 20 reviews the patterns are usually visible.
| Bucket | What it holds | Example |
|---|---|---|
| Pains | What hurts now | "I wake up at 3 a.m. and can't fall back asleep." |
| Objections | Why they hesitate | "These always make me groggy the next day." |
| Desired outcome | What life looks like after | "I just want to wake up before my alarm and feel fine." |
| Failed alternatives | What they tried that didn't work | "Melatonin worked for a week, then nothing." |
- PainsWhat hurts now.
- ObjectionsWhy they hesitate.
- Desired outcomeLife after the problem.
- Failed alternativesWhat they already tried.
The fullest bucket tells you where to start. Many pains point to a pain-point angle, many failed alternatives to a "this time it's different" angle.
How does one review become one hook?
Take one line, keep its words and add the turn to your product. Examples:
| Review | Hook |
|---|---|
| "Every serum I tried made me break out." | "I've broken out from 11 serums. Not this one." |
| "I gave up after 2 weeks." | "If you always quit in week 2, read this." |
| "Melatonin worked for a week, then nothing." | "Melatonin stopped working for me too." |
| "The sizes run tiny, I returned it twice." | "Returned it twice? Here's the size chart that finally fits." |
Use real numbers only when they are true for your customers. More patterns are in 50 ad hook examples, and the hook then goes into a creative brief with its angle.
How much research is enough?
Read 20 reviews before your next brief. That takes about 30 minutes and is usually enough to find one new angle and three hooks. Before a big launch or a new product, go wider: 50 or more quotes across all five sources.
AI tools can help sort a long export into the four buckets, but check every quote against the source, because a model will happily rewrite or invent one. The Research Kit has the sheet and the routine, and the Claude Prompt Pack has prompts for sorting reviews.
Voice of customer FAQ
What does voice of customer mean in marketing?
It means the customer's own words about their problem, the product and the alternatives. In advertising, it is the research that collects those words so ads sound like the audience, not like the brand.
Why read 1-3 star reviews instead of 5-star ones?
Low ratings show what disappoints people, which is where pains, objections and failed alternatives live. Read 5-star reviews too, for the outcome people actually got, but the sharpest angles usually come from the complaints.
Can I use customer quotes word for word in ads?
Quotes from your own customers, yes, with their permission where it is required. Don't present a competitor's review as your customer's words. Use those to find the angle, then write your own hook.
How many reviews should I read?
At least 20 before each brief. For a new product or a big launch, 50 or more across reviews, Reddit, comments and support emails.
What is the difference between voice of customer and a persona?
A persona describes one typical buyer. Voice of customer is the raw material: the quotes you build the persona, the angles and the hooks from.
Terms used here are defined in the Glossary.