For many small businesses they are the same page. Your main service page can be the pillar, and the helpful articles around it support it. A pillar does not have to be a long guide. It has to be the page that best covers the subject and gets the most links from the rest of the group.
Take stock
We read the pages you already have on the subject and mark each one covered, thin, or missing. Your old pages are often more useful than you think.

