The Discoveries menu in Portal is a new feature that allows customers to view critical issues in their environment with a more holistic approach. Using Nutanix Insights, Portal will provide this view based on Field Advisories, constant health checks, end of support equipment, etc.
The Discoveries Details View provides the background, analysis, and corrective actions that can be done to remedy these issues. This will also give you the option to create a case based on the specific issue/topic.
For more information, take a look at the “Discoveries Menu” in the Support Portal.