Zotero is best used with Microsoft Word. The Word Plug-In allows you to automatically insert correctly-formatted citations directly into your documents as you write. The Zotero tab should automatically appear in MS Word after you have installed Zotero.

Select 'Document Preferences' to set your reference style to the Arts University Bournemouth style.
When you need to insert a citation from a source in your Zotero library, click 'Add/Edit Citation'. You will then be able to search for the reference you wish to add. Zotero will format this in the correct way for AUB referencing. If you need to add page numbers to your citation, type these in manually.
When you’ve finished writing, and have inserted all the citations you need to use, click 'Add/Edit Bibliography' and Zotero will generate a list of formatted references in alphabetical order, based on the sources you have cited throughout your work.