Proactively notify the user about any issue
Alert Rule: Condition to send alert (optionally can configure a Action Group)
Action Group: A set of actions to perform
Action Rule: Allows to conditionally trigger or suppress alerts
Administrative Category included information related to the creation, updating and deletion of resource
Alert Signal Sources
Subscription Activity Log: Health and Auto scale Events. Has 90 days retention for information
Azure Monitor Metrics: Native time-series database. 90 days retention
Log Analytics Log Search: Up to 2 years of retention
Alerts are generated instantaneously when using data from Azure Monitor
Leaving Activity Log & Metrics from Resources all other data needs to be sent to Log Analytics before it can be used as a Signal
Services that support auto scaling make use of metrics generated by Azure Monitor to decide when to scale