As you research, save sources by clicking on the Save to Zotero icon (looks like a book, sheet of paper, webcam, etc. depending on the source type) in your browser's toolbar or URL bar.
Organize your sources in Zotero with collections or tags. Edit source information as needed. Take notes if you like.
Create citations and bibliographies by selecting items, right-clicking, and choosing Create bibliography from items. If you are using a word processor, you may prefer the Microsoft Word (or LibreOffice) Plugin.
Optionally sync your Zotero library in the cloud by creating a free online Zotero account at zotero.org.