The most effective social proof is specific and contextual. Case studies with concrete metrics (e.g., "reduced processing time by 35%") outperform generic testimonials. Transparent pricing comparisons—like Wise comparing its rates against Google and PayPal—build trust through verifiable evidence. Persona-based proof that matches the visitor's segment works better than one-size-fits-all approaches. The pattern across A/B tests is clear: specific proof pre-qualifies buyers, while generic proof wastes valuable page real estate.