Using the Drag and Drop Citation Method (Any word processing program, email, blog posts, virtually any electronic document):

See the Annotated Bibliographies tab of this guide

Using the Microsoft Word (Windows and Mac) / Libre Office Plug-in:

Coming soonish (but there is lots of good documentation on Zotero's Word Processor Plug-In help page)

 Official Zotero documentation

• Generating Bibliographies, Citations, and Reports
  • Creating Bibliographies within Zotero
  • Word Processor Integration
  • Citation Styles
  • Reports