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Glossary · Measurement

What is A/B Testing?

An A/B test shows two versions to different visitors at the same time and measures which one performs better. It ends opinion debates with data. A valid result requires a large enough sample and enough time.

Detail

The most common mistake is calling a test after a few hundred visitors and deciding wrongly. A/B testing is often not viable on low-traffic stores; there, known best practices are applied instead. Changing more than one variable at once also makes the result unreadable.

Example

On a page getting 2,000 sessions a week, measuring a meaningful difference usually takes 2–4 weeks.
FAQ

Common questions on this topic.

How is A/B Testing calculated?

The most common mistake is calling a test after a few hundred visitors and deciding wrongly. A/B testing is often not viable on low-traffic stores; there, known best practices are applied instead. Changing more than one variable at once also makes the result unreadable.

Why does A/B Testing matter?

The most common mistake is calling a test after a few hundred visitors and deciding wrongly. A/B testing is often not viable on low-traffic stores; there, known best practices are applied instead. Changing more than one variable at once also makes the result unreadable.

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