Build a comprehensive dashboard for the Shopping tab (organic only). Specify primary metrics (e.g., GMV, purchases, unique buyers, PDP CTR) and secondary metrics/guardrails (e.g., bounce rate, search exits, creator engagement). Define each metric precisely (event- and user-level), dimensions (country, device, acquisition channel), and freshness/SLAs. Then, suppose engagement with the tab is high but purchase rate is low: propose a diagnosis plan including segmentation (new vs. returning, search vs. feed, product category), funnel drop-off analysis, instrumentation checks, and experiments you’d run to isolate UX vs. supply issues.