One of the most powerful features of Zotero is the ability to use your citations in papers as you write them. Zotero will keep track of everything and produce a bibliography at the end. To enable this you need to install some plug-ins that work with MS Word or OpenOffice/LibreOffice.
The "Find It @ MTA" feature allows you to easily access links from Zotero to articles you have saved even if you are off-campus. Clicking on a link will take you to screen that lets you log-in with your MTA username and password and then you will be taken to the page will the full text. Without this configured, when you are off campus you may not be able to get full-text articles the way you can on campus.