Anomaly detection in machine learning is the identification of rarities; whether it be items, events or observations that stand out distinctly from the previously overwhelming majority of data. Anomalies, more popularly known as outliers, are a result of crucial actionable insights that require a systematic approach to be assumed such as system errors, security breaches or change in data patterns. For more info: - https://macgence.com/blog/anomaly-detection-in-machine-learning/