# Missing H1 and value prop — dev spec
Site: yahoo.com · Priority 3 · High · Effort: Low (0.5-2 days)

## Problem
The homepage lacks a clear H1 and value proposition, so visitors arriving with a specific intent are not immediately oriented or guided to their goal.

## Evidence (from the live site)
> The inventory shows h1s: [] and the body sample begins with 'Search Query for Search the web' and navigation links, with no headline or subheadline explaining what Yahoo offers or how to get started.
> The homepage has no H1 and the H2s are generic ('Trending', 'Explore More', 'For You'), with no tagline or explanation of Yahoo's value.

## Current state
h1: None; cta: Sign in, Search the web; notes: The page is a portal with many links and widgets, but no clear hero message or primary action for new or returning visitors.

## Required change
h1: Your world, one search away; cta: Search the web; notes: Add a concise H1 that states the core value (search, news, finance, mail) and a subheadline that addresses common visitor intents, e.g., 'Get the latest news, check your email, and manage your finances—all in one place.'

## Acceptance criteria
- GIVEN a first-time visitor on the affected page
- WHEN the change is live
- THEN Add a concise H1 that states the core value (search, news, finance, mail) and a subheadline that addresses common visitor intents, e.g., 'Get the latest news, check your email, and manage your finances—all in one place.'
- AND no layout regression at 375px / 768px / 1280px
- AND the changed control is keyboard-reachable with an accessible name

## Tracking
- Fire `cro_missing_h1_and_value_prop` 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.