# No hero message — dev spec
Site: yahoo.com · Priority 3 · High · Effort: Medium (2-5 days)

## Problem
The homepage lacks an H1 and a clear value proposition, so visitors arriving with a specific intent (e.g., news, sports, finance) are not immediately oriented or guided to the relevant content.

## Evidence (from the live site)
> H1s: [] and h2s include generic section labels like 'Trending', 'Explore More', 'For You' with no overarching headline or subheadline; CTAs are 'Sign in', 'See more stories on Yahoo 100', 'See forecast'.
> The page is a content aggregator with no hero statement; the first visible elements are navigation and a search bar.

## Current state
h1: None; cta: Sign in / See more stories on Yahoo 100 / See forecast; notes: The page is a content aggregator with no hero statement; the first visible elements are navigation and a search bar.

## Required change
h1: Your window to the world's news, sports, and more; cta: Explore today's top stories; notes: Add a concise H1 that states the value proposition and a CTA that guides users to the main content, reducing ambiguity for first-time visitors.

## Acceptance criteria
- GIVEN a first-time visitor on the affected page
- WHEN the change is live
- THEN Add a concise H1 that states the value proposition and a CTA that guides users to the main content, reducing ambiguity for first-time visitors.
- AND no layout regression at 375px / 768px / 1280px
- AND the changed control is keyboard-reachable with an accessible name

## Tracking
- Fire `cro_no_hero_message` 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
- 315,206 visitors per variant to detect a 5.0% relative lift
- Run at least one full business cycle; duration depends on traffic

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