UTM Tagging Auditor for Google Analytics 4 that audits campaign tagging quality and protects attribution accuracy. Highlights untagged campaign URLs and sessions where auto‑tagging is enabled but utm_source, utm_medium, or utm_campaign are missing, with counts by page location. Surfaces anomalies like unusually long UTM values and separates issues with clear red/green indicators for fast triage. Helps marketers prioritize fixes so channel and campaign performance reporting stays trustworthy.