Each publication can have contact details associated with it. For example, you might want to provide readers with your school's address and phone number.
To add/edit these contact information
On the Dashboard, click the Settings > Contact Information link in the left bar
In here you can add/edit contact information, and choose whether these details are visible to readers or not
Each publication has its own contact details, so for multi-campus schools that publish a separate publication for each campus, you can use each campus's address in the relevant publication.