Enabling observability across today's complex computing environments running distributed applications that rely on both cloud and on-premises services, requires collection of operational data from every layer and every component of the distributed system. You need to be able to perform deep insights on this data and consolidate it into a single pane of glass with different perspectives to support the multitude of stakeholders in your organization. ​

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The recommendation is to observe both resources and platform to operate well and stay secure ​

Azure Monitor collects and aggregates data from various sources into a common data platform where it can be used for analysis, visualization, and alerting. It provides a consistent experience on top of data from multiple sources, which gives you deep insights across all your monitored resources and even with data from other services that store their data in Azure Monitor. ​