Build Your Web Site Around Information, Not Pages
When building a small web site, it is natural to think of it as a set of pages. As the site grows, however, this approach becomes problematic. Information that you want to show on several pages needs to be entered on each of those pages, so updates require making the same change multiple times, increasing the effort required and the chances for errors. Since the content and the HTML markup are intertwined, it is difficult for anyone to edit the content unless they have HTML skills.
There is a better way: store the site’s information in a database. Each page then is created from a template that provides the page structure, with content drawn from the database. This approach puts the information at the center of the site, rather than its presentation (the pages). It brings many powerful advantages over the static HTML approach: