Use the "Wiki" tool to create documents that any member of the group can edit, such as schedules, discussion questions, responses, forums, notes, or a bulletin board. With the default settings, the three most recently added wikis will display on the home page of your project, and all previous wikis are accessible via the "More" tab. Each wiki entry links to a page that shows the full content of the wiki, which can be edited by any member of the project.
How to use this tool:
Click on "Wiki" in the Toolbox to see a list of the wikis for the project. To add a wiki, click "Add Wiki." The body of the wiki will be editable by any member of the project.