What is the purpose of "Data Alerts" in Power BI?

The purpose of "Data Alerts" in Power BI is to notify users about data changes. Data alerts allow users to set specific thresholds or conditions related to their data visualizations. When the data exceeds or falls below these predetermined thresholds, users receive notifications through email or within the Power BI service. This feature is particularly beneficial for monitoring critical metrics, enabling users to respond promptly to significant changes in their data.

The other options, while relevant to different functionalities within Power BI, do not capture the essence of what data alerts are designed for. Limiting data sharing pertains more to access controls and permissions, enhancing visual aesthetics relates to the design and appearance of reports and dashboards, and automatically deleting unused datasets is a function that focuses on data management rather than alerting users about changes.