vSphere Health enables you to identify and resolve potential issues before they have an impact to your environment. vSphere telemetry data is collected from data-centers globally. This data is further used to analyze pre-conditions in your vSphere environment related to stability and incorrect configurations. These issues are reported under vSphere Health and resolution recommendations are provided. It enables VMware to enhance the issue detection without updating the vSphere installation. You can check the health of vSphere Host and vCenter Server.