Collect and publish real case studies or client results

Specific, verifiable results consistently outperform generic testimonials as a trust-building mechanism, and the reason is structural rather than stylistic: a vague claim like "they did great work" is unfalsifiable and therefore easy for a skeptical reader to discount, while a specific claim — a real client, a real number, a real timeframe — is a claim that could, in principle, be checked, and readers extend more trust to claims that carry that implicit accountability even when they never actually verify them.

The distinction between a testimonial and a genuine case study is depth, not just length. A testimonial is typically a brief, positive statement about the experience of working with you. A genuine case study documents the actual before state, the actual approach taken, and the actual measurable outcome — giving a reader real insight into not just that you delivered results, but how, which is a meaningfully more persuasive and more educational piece of content for anyone evaluating whether your specific approach would work for their specific situation.

Client cooperation, where achievable, substantially strengthens this content beyond what you could produce unilaterally. A named case study, with direct client involvement and a genuine quote or validation from them, carries more credibility than an anonymized or client-independent account of the same work — the client's willingness to be named and associated with the result is itself a form of endorsement that a purely self-reported account can't replicate. This is genuinely worth the additional effort of securing client permission and cooperation, even though it's slower and less certain than simply writing up the case study unilaterally.

The specific numbers included matter more for their honesty than their impressiveness. A modest, real, verifiable result — a genuine 23% improvement, honestly reported — builds more durable trust than an inflated or vague claim of dramatic transformation, because the specificity itself signals honesty in a way round, impressive-sounding numbers often don't. Readers have generally developed some skepticism toward marketing claims that sound too perfect, and genuine, specific, slightly imperfect numbers often read as more credible precisely because they don't sound like marketing copy.