NoodleBib is an online tool that allows users to create bibliographies, take notes, organize sources, and write papers. It guides students through the entire research and writing process. Key features include creating citations in different styles, taking notes and organizing them under headings, building outlines, annotating sources, and getting feedback from teachers on works in progress. The document provides instructions on setting up an account, citing sources as you write, and using NoodleBib to create specific assignments like essays or projects.