This page represents a large, key topic in the wiki space.
There could be many child pages below the first level topic pages, each child page gathering other pages on another large topic.
A page like this often says only "The following topics are included:" followed by the Children Display macro listing the pages gathered. The parameter "all=true" is optional and produces a list of all child pages at subsequent levels of the hierarchy. Continue to Wiki Space First Level Topic Example Two to see how the macro works.