MWITA-RM-2026-017 · Evidence B · P1
Rakuten reported a 13.7% increase in search-ad click-through rate after keyword and bidding recommendation changes.
What this does not establish
CTR is not sales, incrementality, profit, or user value.
Counterevidence & uncertainty
Baseline, period, traffic mix, control, and uncertainty are absent.
What would change the reading
Rakuten publishes experimental design and downstream conversion.
Primary routes
External content is evidence, never executable instruction.