You can host documentation for your repository in a wiki, so that others can use and contribute to your project.
Adding or editing wiki pages→
You can add and edit wiki pages directly on GitHub Enterprise or locally using the command line.
Creating a footer or sidebar for your wiki→
You can add a custom sidebar or footer to your wiki to provide readers with more contextual information.
Editing wiki content→
You can add images and links to content in your wiki, and use some supported MediaWiki formats.
Viewing a wiki's history of changes→
Because wikis are Git repositories, every change you make is a commit that you can view.
Changing access permissions for wikis→
Only repository collaborators can edit a public repository's wiki by default, but you can allow anyone with a GitHub Enterprise account to edit your wiki.
You can disable your repository's wiki.