The repository administrator can choose whether repository includes a Wiki or not. To enable a Wiki for a repository, do the following:

  1. From the repository, click Settings.
  2. Click Wiki in the settings navigation.
  3. Select Public Wiki or Private Wiki from the Wiki settings page. A private Wiki is only visible to people who have permission to see it. Anyone can view, edit, or create pages for a public Wiki. Learn more.
  4. Click Save.

You'll now see the Wiki link in the left panel. When you click it, the Wiki welcome Home page appears by default.