Landing Page A/B Testing: The Framework That Consistently Improves Conversion Rates

A 1% improvement in landing page conversion rate is worth more than a 20% increase in ad budget. Yet most businesses never test their landing pages. Here’s the systematic approach we use to consistently improve conversion rates.

What to test (and in what order)

Not all tests are equal. Test in order of potential impact: headline first (biggest impact), then CTA copy, then social proof placement, then form length, then page layout. Don’t test button colour until you’ve tested your headline — the headline drives 70% of your conversion rate.

The testing hierarchy

• 1. Headline: outcome-focused vs feature-focused vs problem-focused
• 2. CTA copy: ‘Get Free Audit’ vs ‘Show Me What’s Broken’ vs ‘Book My Call’
• 3. Social proof: testimonial above fold vs below form vs in hero section
• 4. Form length: 3 fields vs 5 fields vs 7 fields
• 5. Hero image: team photo vs results graphic vs no image (text only)

How long to run a test

Run each test for at least 2 weeks and until you have at least 100 conversions per variant. Statistical significance matters — a 60/40 split with only 10 conversions tells you nothing. Use a significance calculator (freely available online) before declaring a winner.

How to implement without a developer

Tools like Google Optimize (free), VWO, or Optimizely let you run A/B tests without touching your website code. For static HTML sites, the simplest approach is to create a second version of the page (e.g., /landing-page-b.html), split traffic 50/50 using your ad platform, and compare conversion rates in GA4.