Breadcrumbs
If you look at the top of this page, you will see something like:
BW: Boltwire Projects > Example Page Format Basics > Breadcrumbs
That is created using a headeer with a breadcrumbs statement in it.
In this specific case, in the bwwkiki.header page, the following code is placed:
[if ! equal {p0} 1]BW: [(breadcrumbl name=text)][if]
BW: Boltwire Projects > Page Format Basics > Breadcrumbs
Basically what is says is...
IF the current page level (which is in {p0}) is NOT equal to 1 (ie the first level), then display the output.
Since this page's level which is in {p0} is equal to 3, it is not equal to the first level, so the breadcrumbs are displayed.
The breadcrumbs make it easier for the visitor to move about that section of the website but clicking on back links rather than using the BackPage button on the browser.
