Zotero website defines it like this:
“Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.”
If you ever tried to cite a source in your paper by hand, you already know that it is not an easy task. There are a lot of details that you need to remember before you can correctly format your citation. If you need to cite only one or two sources in your whole life, then that hassle would not look too bad.
However, as a college student, you will need to write many papers and to prepare many research documents. Almost all of them need detailed citations. So, learning and correctly implementing a citation style is a must for you.
Zotero helps you with that task.
Zotero will help you collect your citations you need for your research in one place. It also helps you to organize them, to clean up the details, and finally to generate automatically-formatted citations inside your word processor (or copy/paste the citations into your paper if you like).
You can download and install Zotero from their website: https://www.zotero.org/
You can read all about Zotero on Wikipedia.
Or visit Zotero’s own support website to learn more about it.
If you still have questions, please ask them in our forum.