Zotero is a citation manager.
Citation managers (also called bibliographic management tools or citation management tools) help you organize your research, sources, notes, and citation information efficiently. They make it possible to generate reference lists, citations, and bibliographies in many styles with just a few clicks.
Metadata: Data about Data
A more helpful definition, in this context: Metadata is the information about a source. It includes the title, publisher, publication year, and other information about a book; the URL, update history, creator, tags, and other information about a source (book, webpage, article, video, etc).
Some metadata is immediately obvious to us: If we pick up a book, we can look at the title page and get a lot of metadata. But online sources often also have metadata within their coding that another computer program, like Zotero, can read.
There are three steps to setting up Zotero.
There are two tools that you should download from zotero.org/download/ to have the best Zotero experience.
Congratulations, you have a working Zotero account!