In order to add citations to your text and create a bibliography you need a Zotero plugin in your word processor. The plugin is available for Word (stand-alone version), LibreOffice and Google Docs. The plugin is usually installed automatically when you start Zotero desktop for the first time. To ensure installation close your word processor before starting Zotero.
There are about 10 000 ready-made citation styles available. You may modify the styles by yourself if necessary. The styles are made with CSL language. It is an open standard describing the internal structure of the style.
Watch the video by Georgia State University Library (3:44):
Adding citations and creating bibliographies with the Word toolbar (opens in new tab).
Watch the video by Idaho State University Libraries (7:20):
Creating citations & references (opens in new tab).
Watch the video by University of Akron Libraries (3:26):
Editing a citation style sheet for Zotero (opens in new tab).
Citing and bibliography creating will be dealt with in detail during the teaching session.