Suffix usually used to provide additional information to your servlet/JSP page. Just check editor interface in TouchUI: the url looks like
So you always stays on the same page /editor.html, but suffix notifies Edit Interface which page to edit.
It is better to use the suffix with selectors only that will help the dispatcher when flush cache.
<resource path>/results.html/suffix (Not recommended )
<resource path>/results.html/suffix.suffix1 (Not recommended )
<resource path>/results.slelector.html/suffix (Recommended)
<resource path>/results.slelector.html/suffix.suffix1 (Recommended)
Hope that helps!