If you use a CamelCase expression in a text, Wiki supposes that you will explain this expression on a separate page and creates a question mark - also called a "begging page" or rather "begging link" because the page does not exist yet.. if you click on that questionmark, a new page is created with the title indicated, and you can decide where to place the page in the hierarchy of pages.

When you create a new page you should know where and what you do!