the.com/testimonial

A stranger's opinion, paid for in flattery, trusted more than the experts.

means A statement praising a product or person's qualities, usually offered as proof that others should trust them too.

from From Latin testimonium, 'evidence' or 'witness,' built from testis — 'witness' — the same root that gives us testify and testament. The word once lived in courtrooms, where a witness swore to what they'd seen; it slowly wandered into commerce, where the 'witness' now swears not to a crime but to how soft a mattress is.

selection bias
happy customers write them, furious ones sue instead
origin
latin testis, same root as testify
marketing trick
specific details beat superlatives for believability
fun fact
five star reviews are often the least trustworthy ones
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