Diigo is a social bookmarking and annotation tool that allows people as well as groups of people to highlight content and add comments to the website.

Diigois a multi-tool for personal knowledge management. The site helps individuals save and tag online resources for easy access. It helps individuals annotate webpages as they browse. The tools Outliner helps users organize links, references, and personal work to come up with an organized research base. It also helps you share your research with friends, workmates, and classmates.

Diigo has developed features to help users collect, organize, save, and store information online. These features or tools are available at just a click of a button when you install Diigo extension on google chrome. Whenever you are browsing online and you find work that you think will help with an assignment or personal research, you can easily save or share it with a group.

Diigo has a class or group collaboration tool that enables people to share content and websites they find online. The tool helps improve collaboration on research projects. It is a good tool for people working on a group assignment

they can finish the work in unison.