Conversion Funnel

A conversion funnel models a goal as a sequence of stages — say, landing → signup → activation → purchase — and measures how many users survive each transition. The shape of the funnel shows exactly where people fall away, turning a vague "we need more customers" into a specific "we lose 60% at signup."

Funnels are the diagnostic layer under CRO and growth design. The biggest leverage is usually the leakiest step with the most traffic above it — fixing that beats optimizing a stage almost no one reaches.

In practice

Instrumented for the first time, a SaaS funnel reads: 100% land, 34% start signup, 21% finish it, 12% activate, 6% pay. The shock is the signup finish rate — email verification loses 13 points, worse than any other stage. The team defers verification to after first value and the whole funnel re-shapes downstream. Without the stage-by-stage numbers, the team would have kept polishing the landing page — the stage that was performing fine.