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A/B Testing

2 postsUpdated November 2025

A/B testing means comparing two versions of a page to see which performs better. On live client sites, most advice assumes you can test freely or break things and fix them later. You often cannot. Production changes affect real customers and shared surfaces amplify risk.

Why A/B Tests Break Production

Why tests fail on live sites and how shared surfaces amplify risk.

Why A/B Test Results Mislead

Why winners still lose money and how persona mismatches hide in aggregate data.

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