Your question is Conversion Rate Drop Framework. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
If a client’s conversion rate dropped suddenly, what is your step-by-step diagnostic framework?
Explain how you would first validate the metric and rule out tracking or data-quality issues, then localize the decline across the conversion funnel and relevant segments. Describe the hypotheses you would investigate, the data you would request, how you would distinguish internal from external causes, and how you would recommend next actions and guardrails.