[ClusterLabs] Why do clusters have a name?

[Brian Reichert]

This will sound like a dumb question:

The manpage for pcs(8) implies that to set up a cluster, one needs
to provide a name.

Why do clusters have names?

Is there a use case wherein there would be multiple clusters visible
in an administrative UI, such that they'd need to be differentiated?

-- 
Brian Reichert				<reichert at numachi.com>
BSD admin/developer at large