To
create or edit objects in the Shared Objects page group, you must
have at least one of the following privileges:
Manage All privileges on the Shared Objects page group
Manage All global privileges on All Page Groups
To delete an object in the Shared Objects page group, you must be the creator of the object.
The Shared Objects page group contains objects that can be used by any page group. These objects include categories, perspectives, page templates, navigation pages, styles, and custom types (attributes, item types, and page types).
Shared objects enable better integration between page groups while permitting customization at the page group level. Thus, anytime you want to share an object across multiple page groups, you might consider creating it in the Shared Objects page group.
If you create an object in one page group, and later realize that the object would be useful in other page groups, you can promote that object to the Shared Objects page group, instead of having to re-create the object in the Shared Objects page group.
The Shared Objects page group also contains users' personal pages.