Article

What Is A/B Testing? The Complete Guide: From Beginner to Pro

CXL · cxl.com Free Intermediate

The most rigorous free explainer on running valid tests without fooling yourself with noise - essential reading before you're tempted to call a test 'significant' after 40 conversions.

  • Calculate sample size ahead of time rather than eyeballing a dashboard - a rough rule of thumb is 350+ conversions per variation before trusting a result.
  • Conversion research, not guessing, is what generates test ideas actually worth running.
  • Test the biggest friction point you can find, not the ten-minute button-color change.
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The question it answers

  1. I barely get 500 visits a week. What should I A/B test first, and can I even trust the results?

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  3. A free, structured audit across homepage, PDP, cart, checkout, mobile and speed - the checklist to run yourself in an afternoon... cleancommit.io Template 148-Point Shopify CRO Audit Checklist Clean Commit
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