What is Azure Monitor? And why do I care?
Devops ;)

Azure Monitor helps you maximize the availability and performance of your applications and services. It delivers a comprehensive solution for collecting, analyzing, and acting on telemetry from your cloud and on-premises environments. This information helps you understand how your applications are performing and proactively identify issues affecting them and the resources they depend on.

Just a few examples of what you can do with Azure Monitor include:
Detect and diagnose issues across applications and dependencies with Application Insights.
Correlate infrastructure issues with VM insights and Container insights.
Drill into your monitoring data with Log Analytics for troubleshooting and deep diagnostics.
Support operations at scale with smart alerts and automated actions.
Create visualizations with Azure dashboards and workbooks.
Collect data from monitored resources using Azure Monitor Metrics.
Investigate change data for routine monitoring or for triaging incidents using Change Analysis.