Groups are comprised of logical collections of objects. You can report status on a group basis, allowing you to monitor your system in a way that you prefer. You can also nest groups (a group contained within a group) to provide hierarchical or topology views.
One or more user-defined groups might already be defined on your HMC. Default groups are listed under Custom Groups node under Server Management. The default groups are All Partitions and All Objects. You can create others, delete the ones that were created, add to created groups, create groups using the pattern match method, or delete from created groups by using the Manage Custom Groups task.
Use the online Help if you need additional information for working with groups.