Client Testimonials: Why They Matter and How to Use Them

When a visitor arrives on your website, one of the first questions they ask themselves is: can I trust these people? The answer to that question is built from several signals — the design, the content, the photos. But one of the most powerful signals, and often the most underused, is what real clients say about you.

Text you’ve written yourself can be as good as it gets — it’s still your own word. What your clients say is perceived differently. It’s external validation, and that’s exactly what an undecided visitor needs.

---

What testimonials actually do

Testimonials aren’t there to “decorate” your website. They answer concrete objections the visitor has in their head.

“Do they deliver what they promise?” — A testimonial that describes a specific result answers this question.

“Is this right for a business like mine?” — A testimonial from a client in the same sector or with the same type of project answers this question.

“Is it really worth the investment?” — A testimonial that describes what the client concretely gained answers this question.

A site without testimonials leaves all these questions unanswered. The visitor has to make a decision with less information than if you had provided this evidence.

---

Testimonials that work vs those that don’t

Not all testimonials have the same impact. The difference often comes down to specificity.

“Great service, would recommend!” — This type of review is so generic it says nothing. Anyone could have written it. It provides no concrete proof.

“Marcio redesigned our site in six weeks. We now receive enquiries every week, whereas before the phone barely rang.” — This type of testimonial describes a starting situation, a timeframe, and an observable result. It’s credible because it’s specific.

Specificity is the key. The more a testimonial describes a concrete situation, the more value it has for a visitor trying to picture themselves in the same position.

---

How to collect usable testimonials

Most businesses don’t have testimonials on their site not because their clients are dissatisfied, but because they’ve never asked.

Ask at the right moment. The best time to ask for a testimonial is right after a client has expressed satisfaction — at the end of a project, after a positive follow-up, or following an unsolicited comment. That’s when the momentum is favourable.

Make it easy. The more effort you ask for, the fewer responses you’ll get. A short message with two or three specific questions works better than a long form. Questions like “What made you decide to contact us?” or “What changed after we worked together?” generate richer answers than a generic request.

Use Google reviews. Google reviews have the advantage of being verifiable by anyone who reads them. Encouraging your clients to leave a review on your Google Business Profile is doubly useful: for your online reputation and for your local ranking.

---

Where and how to display them on your site

The position of testimonials on your site matters as much as their content.

On the homepage. One or two well-chosen testimonials, placed after your main presentation, immediately reinforce credibility before the visitor goes further.

On service pages. A testimonial directly related to the service described on that page is more relevant than a generic one. If a visitor is looking at your web creation page, a testimonial from a client who had their site rebuilt is more convincing than one about SEO.

On the contact page. Just before the form, a short testimonial about the experience of working with you can reduce hesitation at the moment of taking action.

With minimal identification. A first name and a city (without necessarily showing a photo or full name) is enough to make a testimonial credible. More identification is better — but complete anonymity significantly reduces impact.

---

What we do at Slash.lu

When building a site, we systematically integrate a testimonials section with Schema.org Review markup, which allows Google to display your reviews directly in search results as star ratings.

If you already have Google reviews or client feedback, we help you select the most relevant ones and present them effectively. If you don’t have any yet, we suggest a simple approach to start collecting them.

If you’d like us to assess your current situation, contact us.

To see how we present client results on real projects, explore our work.

To understand how your online visibility influences the behaviour of potential clients, read our article on why businesses lose clients without a website in 2025.

→ Going further: our SEO service in Luxembourg .