Which feature is useful for defining custom alerts in Dynatrace?

The feature that is especially useful for defining custom alerts in Dynatrace is tags. Tags allow users to categorize and organize entities based on specific characteristics or criteria. By applying tags to services, hosts, or other entities, you can build alerting rules that focus on specific groups or types of data, enhancing the granularity and relevance of alerts. This means you can set alert thresholds or conditions that apply only to entities with certain tags, allowing teams to prioritize alerts based on the business significance or operational importance of the affected services.

Tags help streamline the alerting process by enabling targeted configurations, making it easier to manage and respond to incidents as they arise. This flexibility in defining alerts based on contextual information significantly improves the monitoring efficiency for complex environments. Metrics, dashboards, and legacy data, while relevant to monitoring and analysis, do not specifically provide the same level of granularity and relevance for custom alert conditions as tagging does.