Define intended use case for displayName

index.bs

@@ -3254,8 +3254,12 @@ credential.
         with more than one [=user account=] at the [=[RP]=].
 
     :   <dfn>displayName</dfn>
-    ::  A [=human palatability|human-palatable=] name for the [=user account=], intended only for display. For example, "Alex Müller" or "田中倫". The
-        [=[RP]=] SHOULD let the user choose this, and SHOULD NOT restrict the choice more than necessary.
+    ::  A [=human palatability|human-palatable=] name for the [=user account=], intended only for display.
+        [=Clients=] may display this value to help users differentiate between multiple sub-accounts for a
+        given [=user account=] for situations in which every credential uses the same value for
+        {{PublicKeyCredentialEntity/name}}. Examples of suitable values for this identifier include,
+        "Alex Müller" or "田中倫". The [=[RP]=] SHOULD let the user choose this, and SHOULD NOT restrict
+        the choice more than necessary.
 
         - [=[RPS]=] SHOULD perform enforcement, as prescribed in Section 2.3 of
             [[!RFC8266]] for the Nickname Profile of the PRECIS FreeformClass [[!RFC8264]],