Evernote is a note-taking software that allows users to create different types of notes including text, webpages, photos, audio and video. Notes can be organized into notebooks which can then be shared with others. The document provides a step-by-step tutorial on how to sign up for an Evernote account, download the software, create different types of notes, organize notes into notebooks, and share notebooks. It also discusses additional tools and add-ons that can be used with Evernote.