A test can generate more leads while sending fewer qualified opportunities to sales. Or increase purchases while shifting customers towards lower-margin products.
Those tests look like winners if the initial conversion is where you stop measuring.
The biggest wins come from optimizing for conversion quantity and quality at the same
time.
Instead of asking only "Did more people convert?" we also look at what those conversions were worth, what happened downstream, what other metrics changed, and whether the effect held up over time.
We call this Koalatative CRO (but some people spell it "qualitative").