Short version: Trust signals are visible cues that help visitors feel a business, offer, product, or website is credible.
They can include reviews, case studies, client logos, certifications, clear contact details, secure checkout, transparent pricing, strong policies, guarantees, press mentions, before-and-after proof, or professional design consistency. The right signal depends on the risk the visitor feels.
Trust signals work best when they are specific and placed near the decision they support. A testimonial hidden far down the page may help less than a small proof point beside a pricing table, form, product page, or checkout step.
In practice, trust signals should answer a specific hesitation: whether the business is real, whether the result is credible, whether payment is safe, or whether support will exist later.
Related terms: Social proof, Case study, and Conversion rate.