Power BI consultants identify and address outliers using statistical techniques like Z-scores, interquartile ranges (IQR), and anomaly detection algorithms. Visualizations like boxplots or custom alerts in dashboards highlight anomalies. Consultants then investigate whether these outliers are data errors, exceptional events, or signs of underlying issues. Power BI consultant clean or adjust data as necessary using Power Query and create measures in DAX to track potential anomalies in real time. Addressing outliers ensures data accuracy, prevents skewed insights, and helps businesses respond proactively to unusual patterns.