Specifying this parameter indicates that the health for the entire cluster needs to be retrieved. If both cluster and ComputerName ...

Specifying this parameter indicates that the health for the entire cluster needs to be retrieved. If both cluster and ComputerName are specified then the health of the cluster to which the ComputerName belongs is returned. If cluster is specified in a multi-site scenario then the health of the cluster in the site to which the server on which the cmdlet is executed belongs is returned. The server could also be represented by using the ComputerName parameter