The compliance pane will show the full list of Config Policies that apply to the selected device, along with the current compliance state for each policy. When clicked, each policy will show more information on any issues that prevent the device being compliant such as failures. Note that if the device is compliant with all policies it is still possible for the device itself to be non-compliant, in this case the device will be marked as non compliant and all policies will be marked as compliant.