A testimonial is a statement from a real customer describing their experience of a business, product or service, published by that business to help others decide. It might be a sentence quoted on a service page, a short video or a longer story on a dedicated page.
How testimonials work
A testimonial works because it is someone other than the seller doing the talking. Buyers discount what a business says about itself, so a credible third-party voice carries more weight. That is the core of social proof.
Credibility comes from specifics. “Great service, highly recommend” could be about anyone. “They rewired the whole ground floor in two days and left the place cleaner than they found it” tells the reader something they can picture. A name, a town, a job title or a photo, all with permission, make it more believable still.
Testimonials differ from online reviews in where they live and who controls them. A review sits on a third-party platform such as Google or Trustpilot and the business cannot choose which ones appear. A testimonial is selected and placed by the business on its own site or in its own advertising, which is exactly why the rules about it are strict.
Why it matters
On a service page or landing page, a relevant testimonial placed near the enquiry form answers the question many visitors are silently asking: has this worked for someone like me? It often does more than another paragraph of your own claims.
In the UK, a testimonial used in marketing is subject to the CAP Code. You must be able to show it is genuine, hold contact details for the person who gave it, have their permission to use it and not use it to make claims you could not otherwise support. If a customer says your supplement cured their back pain, publishing that is your claim, and you need the evidence.
Consumer law now goes further. The Digital Markets, Competition and Consumers Act 2024 bans fake reviews and the concealment of incentivised reviews, and the Competition and Markets Authority has enforced these rules directly since April 2025, with the power to fine. A made-up testimonial, or one quietly paid for with a discount, is a legal risk, not just an ethical one.
Common mistakes
- Inventing testimonials for a new website “until real ones come in”.
- Rewriting a customer’s words to make them more glowing, then presenting the result as a quote.
- Using initials only (“J.S., London”) for every testimonial, which looks made up even when it is not.
- Offering a gift card for positive feedback without disclosing it.
- Putting all testimonials on one page that few visitors open, instead of next to the relevant service.
- Keeping testimonials about a service you no longer offer, or a price you no longer charge.
How to act on it
Build collection into your process. When a project ends well, send a short email asking two or three specific questions: what problem they had, what changed, and what they would tell someone considering you. Specific questions produce specific answers.
Keep a simple log: the original wording, the date, how it was given, the customer’s contact details and their written permission for each place you use it. If you trim a quote for length, keep the meaning intact and use an ellipsis. If you gave any incentive for feedback, say so wherever the testimonial appears.
Then place them with care. Match each one to the page it supports: a testimonial about a kitchen refit belongs on the kitchens page, not the homepage carousel. A longer, evidenced story can become a case study. When I design landing pages for paid ad campaigns, choosing and placing genuine testimonials near the call to action is part of the work.