It's easy - just select the desired access level, copy this link and send it via email, instant message, etc.Link: Just a link to your wiki. Post this anywhere and people can ask you for the invite key.
Editing
Go to the wiki home page and click on login link (top right in the green bar)
Enter the Password
Go to the page you want to edit, then click on blue edit page button
The look of the page changes. You’ll see a toolbar at the top, similar to a Microsoft Word toolbar. For the most part, you edit as if you were editing in Word.
When done, click on save at the bottom and you’ll jump to the newly edited page