As stated, the Dashboard is a special Confluence Entity; so You might wonder If You want to use the Dashboard at all, or use a Page instead, there are not so many good reasons for the first, as (in my opinion) using a page has most benefits.
The Dashboard has no children as pages, blogpost or similar, all these are in spaces below the Dashboard
The Dashboard can only be changed via Confluence Administration -> Configuration -> Look And Feel -> Layouts - Global Layout. Refer to Global Layout
Above, it is claimed that "Is the Default landing page, and still - not always...." , this is why:
When user lands on the Confluence URL root, like http://www.mysite.dk/ or http://www.mysite.dk/confluence/ they are redirected to the Space determined in Confluence Administration -> Configuration -> General Configuration (Site Homepage):
Whereas, when a user in Confluence click on the "Dashboard" in the Breadcrums:
they are redirected to the relative URL /dashboard.action , displaying the Dashboard, nomatter what is set in the General Configuration.
This is for me not logical, and for the developer someting to take care of.
If You decide not to use the Dashboard, some steps can achive this: