[cubecul]

In one way, this is essentially the "wedge". You start with a very specific long tail keyword, but you also cover related searches and topics, and the nice part is that your website analytics will then feed you more long tail keywords that are related but not exactly this page: those are ideas for other pages.

This is one reason why you'll see a page with one topic as a title often branch off to cover many related but sort of unexpected topics throughout the page - it's to cover the main keyword but also grab coverage on the related ones that might be easier to rank for (by simply mentioning it in a page vs. dedicating a page to it). As the owner of that site, you might see that one of these pages could be getting traffic from hundreds of keywords, and 10 of them are on a distinct enough topic that warrants another page. So you build a page for that, etc.