Is a Subtemplate Necessary for the Site?

One of the benefits of using a subtemplate is that you can reduce the number of page templates used in a Web site. Through a subtemplate, you can have the same page template used for both primary and secondary pages.

This is one reason why planning is essential. While a subtemplate can reduce the number of page templates, it also means that you have a subtemplate to manage for the Web site. Fewer page templates means that site-wide changes are easier to make. Subtemplates can also add a level of static information because you can add HTML, images, and other similar static site assets to a page that you may want placed on a certain number of pages (such as the secondary pages) that would otherwise have to be managed separately from the subtemplate.

The subtemplate can also help you place multiple placeholders within a single placeholder. Since a placeholder can contain a subtemplate, and a subtemplate can contain a placeholders, then it could be that you want the subtemplate present for future Web site expansion that is still to be determined.