There are four basic ways to add references to your Zotero library.
You can upload a list of references that you have exported from a research database. The list needs to be in a format that Zotero recognizes, such as RIS, Zotero RDF, or BibTex.
You can drag and drop files into your Zotero library, and it will create a record for you. For newer PDFs, Zotero can even retrieve and auto-fill some of the metadata. If Zotero can't determine the metadata, you can update or enter the information manually.
The Zotero Connector is a plugin that automatically captures citation ifnormation from your browser and saves it to your Zotero library.
This is the easiest way to add references to your Zotero library wile you are actively searching or researching.
You can save a single reference, like a journal article or webpage, or multiple items as a time if the connector recognized multiple items on the page. Note: the connector icon will change depending on what type of document Zotero thinks you're looking at.
You can manually type in bibliographic information for each item you want to add to your library. Select the type of source, then enter information onto the form.
In Zotero: