Not all reviews are created equal. Marketers should differentiate between emotional feedback and functional feedback. This allows for more precise messaging, using functional proof for practical-minded B2B buyers and emotional proof for industries where feeling is paramount.

The Pratfall Effect shows admitting a flaw can increase likability and trust. A Reddit ad for the Nudge podcast titled "Five reasons why you shouldn't listen" performed 4x better than a standard ad listing benefits. This counterintuitive approach grabs attention and builds rapport by subverting expectations.

For a book on divorce, the highest-performing ads used copy like "stuff that your lawyer won't tell you." This strategy taps into a customer's inherent skepticism of traditional service providers in a given field, creating a powerful hook that positions your product as an insider's guide.

To build trust, admit a weakness using the 'stolen thunder' effect. The most advanced application is admitting a flaw that is the mirror image of a strength. For example, Buckley's cough syrup's slogan, 'It tastes awful. And it works,' uses its bad taste to imply potent medicinal effectiveness.

A perceived product flaw can be a primary value proposition for a different type of customer. For example, a diffuse global audience, useless to local venues, becomes a powerful asset for organizations aiming for international reach, unlocking a new market.

The 'Pratfall Effect' suggests showing a flaw can make a person or brand more appealing. However, this has a major caveat: it only works from a position of strength. A competent brand like Guinness can highlight its slow pour time as a virtue. An incompetent brand admitting a flaw simply confirms its incompetence, making the situation worse.

Don't shy away from industry-specific lingo in advertising. Using terms that only your target audience understands (e.g., "SLPs" for speech pathologists) acts as an immediate trust signal. It proves you're an insider who deeply understands their specific problems, making the message more resonant.

The "pratfall effect" shows that revealing a minor flaw can make a brand more relatable and likable. Guinness successfully used this by framing its slow pour time as a virtue ("Good things come to those who wait"), turning a potential weakness into a strength that builds trust and brand character.

After establishing competence, admitting a minor flaw or making a small blunder (a "pratfall") can significantly increase appeal. This humanizes a person or product, making them seem more relatable and trustworthy. It works because it proves honesty and makes other claims more believable.