What should a CRO review do when the conversion data is wrong?

Asked to improve website conversion when GA4 is broken or untrusted? How to separate what you can fix immediately through observation from what needs clean data first.

What should a CRO review do when the conversion data is wrong?

It is one of the most common situations we walk into: a business knows its website should be converting better, wants to start conversion rate optimisation (CRO) work, and then discovers in week one that GA4 is double-counting purchases, missing basket steps, or counting failed form clicks as leads. That leaves the team with an awkward question: **do we freeze all website improvements until analytics is fixed and has collected three months of clean data, or can we start improving the journey now?** The short answer is that you don't have to sit on your hands, provided you know which decisions require statistical funnel data and which problems can be proven directly on the screen in front of you. ## What needs clean analytics vs what you can prove by watching the journey Not every conversion obstacle requires a 50,000-visitor A/B test or a pristine GA4 funnel chart to prove it is hurting your business. If a mobile visitor cannot tap the "Continue to Payment" button because a chat widget sits directly on top of it on an iPhone screen, you don't need three months of clean GA4 data to know that is a bug. Conversely, if someone wants to redesign your entire category page layout bas