When you don't have an account, or aren't logged in, you'll be able to see pages and information on RealSuperPowers.com, but you won't be able to add to them.
When you are logged in, most pages will present you with a few extra features, allowing you to add and update site pages. For example, you should hopefully see this:
The Edit link allows you to update the content on the page you're currently viewing. The Add Child Page link allows you to create an entirely new page, under the page you are viewing.
When you are editing a page, or creating a new page, you have the option of deciding which parent page to file it under:
In the previous picture, "Getting Started" is one level under "Super Powers -- The Real Ones." Beneath "Getting Started" is "Posting Guidelines."
So "Super Powers -- The Real Ones" is the parent page to "Getting Started."
"Getting Started" is the child page to "Super Powers -- The Real Ones."
And "Posting Guidelines" is child to "Getting Started."
"Introduction" is the 2nd child page to "Super Powers -- The Real Ones," after "Getting Started."
From time to time while logged in, you may see this:
If you click on one of these links, you'll be taken to a page where you can add a brand new page to the site.
If you were writing a new page on a previously unmentioned super power, say Time Travel, you might decide to file that under the parent page of "More Powers." That way, anybody visiting the "More Powers" page will see in Navigation that "Time Travel" is a subpage. It is always best to pick a relevant parent page.