How much traffic do you need for CRO?
Classic A/B testing works best with roughly 1,000 conversions a month on the page being tested. With less, research-led redesigns and sequential tests on the biggest problems deliver faster, more reliable gains.
Choosing a CRO approach by monthly conversions|
| Under 100 | Research-led redesign of the biggest problems | Clear before-and-after comparisons, not statistical tests |
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| 100 to 1,000 | Sequential tests on high-impact changes (headline, offer, form) | A few decisive tests per quarter |
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| 1,000 or more | A/B and multivariate testing program | Several tests a month, compounding gains |
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Thresholds are rules of thumb; the real limit is the size of the improvement you want to detect.