Subsites are the individual areas of the website that web editors have control over. The easiest way to think of a subsite is that it is a small, autonomous website that lives on top of the create WordPress installation. Most often, a subsite will be specific to one part of the college's work.

So http://mlc-wels.edu/library will be a subsite. So is http://mlc-wels.edu/network-serivces or http://mlc-wels.edu/graduate-studies. Someone who has editing privileges for the Library subsite does not necessarily have privileges for the Graduate Studies subsite.

They help us logically separate areas of the website along with providing a framework for permissions.