With the basic host management workflows, you can put a host into maintenance mode, make a host exit maintenance mode. You can also move a host to a folder or a cluster, and reload data from a host.

Enter maintenance mode
Puts the host into maintenance mode. You can cancel the task.
Exit maintenance mode
Exits maintenance mode. You can cancel the task.
Move host to cluster
Moves an existing host into a cluster. The host must be part of the same data center, and if the host is part of a cluster, the host must be in maintenance mode.
Move host to folder
Moves a host into a folder as a standalone host. The host must be part of a ClusterComputeResource in the same data center and the host must be in maintenance mode.
Reload host
Forces vCenter Server to reload data from a host.