Configure State to SCOM Group that Depending on his Members

your create Group in SCOM Console called "My Group" with computer object member

In Discover Inventory under Monitoring tab, you can see that on group didn't have State, that because group was not inherited the monitors from is members

to configure state that depend on members status [Useful in dashboards], you need to create Dependency monitor

Configure Dependency Monitor on a group membership [choice the second]

as you can see the Group now get the State from is Member