Definition
The canonical answer.
Conversion Rate Optimization (CRO) is the discipline of increasing the share of visitors who take a valuable action, using research, experimentation, and measurement rather than taste. Done properly it is a statistics practice: hypotheses from evidence, tests sized to detect real effects, and verdicts that admit what a test
Worked example
In practice.
Session replays show visitors stalling at a long form. The team tests a three-field version against the original with a pre-computed sample size. Completion rises with the effect above the minimum detectable threshold, so the change ships; a smaller observed lift would have been reported as inconclusive,
Where this work happens: Conversion
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