Evernote is a web service and software application that allows users to take class notes, keep information organized across devices, and access notes from any device. It offers customizable notebooks, searchable tags, and the ability to upload pictures, audio, documents and web clippings. Evernote can also be used to capture screenshots, share notebooks for group projects, and send notes to email or social media. The presentation discusses how Evernote can benefit students by keeping materials organized, enabling collaboration, and facilitating the use of digital content, as well as how it can help businesses and employees with tasks like scheduling, sharing files, research, and communication.