# No social proof in hero — dev spec
Site: allbirds.com · Priority 3 · High · Effort: Medium (2-5 days)

## Problem
The hero lacks any trust signals (reviews, ratings, or customer count), so first-time visitors may doubt the comfort claim and hesitate to click through.

## Evidence (from the live site)
> Hero H1: 'Wildly Comfortable. Super Natural.' with CTAs 'SHOP MEN' and 'SHOP WOMEN' — no review stars, no 'loved by X customers', no press logos.

## Current state
h1: Wildly Comfortable. Super Natural.; cta: SHOP MEN / SHOP WOMEN; notes: No social proof in hero section.

## Required change
h1: Wildly Comfortable. Super Natural.; cta: SHOP MEN / SHOP WOMEN; notes: Add a line under the CTAs: 'Rated 4.6/5 by 50,000+ customers' or a small strip of press logos (e.g., 'As seen in Vogue, GQ, Forbes').

## Acceptance criteria
- GIVEN a first-time visitor on the affected page
- WHEN the change is live
- THEN Add a line under the CTAs: 'Rated 4.6/5 by 50,000+ customers' or a small strip of press logos (e.g., 'As seen in Vogue, GQ, Forbes').
- AND no layout regression at 375px / 768px / 1280px
- AND the changed control is keyboard-reachable with an accessible name

## Tracking
- Fire `cro_no_social_proof_in_hero` on interaction with the changed element
- Verify the event fires in BOTH variants before opening traffic

## Test plan
- Two-proportion z-test, 95% significance, 80% power
- 299,882 visitors per variant to detect a 5.0% relative lift
- Run at least one full business cycle; not testable at current traffic

## Rollback
Feature-flag the change; revert if the primary metric drops for 3 consecutive days.