For technical audiences, it's OK to use alert to refer to automated messages from apps, products, services, and websites.
For general users, don't use alert to refer to a system message. Use notification instead.
Don't use alert as a synonym for reminder.
Examples
When
hosting a service in the cloud, you may need to monitor and send alerts
in response to specific conditions, such as service
interruptions.
To receive an alert whenever an event occurs ....
Select Add alert.