Ecommerce analytics with anomaly detection is the practice of using statistical or AI-driven methods to automatically identify when a metric in your store deviates meaningfully from its expected range, so that problems like a sudden conversion rate drop, a tracking failure, a ROAS spike, or an inventory anomaly are surfaced immediately rather than discovered days later in a scheduled report. Standard analytics shows you what happened. Anomaly detection tells you when something happened that should not have, or when something stopped happening that should have continued.