GA4 self-audit focused on attribution integrity and data quality. Identifies spikes in Unassigned and (not set) sessions, highlights landing pages affected by missing parameters, and quantifies conversions tied to unknown sources. Evaluates how Consent Mode impacts Google/CPC attribution and detects over-attribution to Direct. Uses concise tables and trend lines to pinpoint misclassified traffic and measurement gaps. Ideal for marketers and analysts validating channel grouping and event parameter completeness.