We might divide a page template into a header, content, sidebar and footer where these are in separate files. The content will change most between pages, so rather than having a content file, we include the content into a page file which pulls in the individual template files and defines the unique features of that page. The unique features of a page will be the title, description and article content. We can define these at the start of the page template with say PHP code to set the value of variables that are used by the other templates such as the header template. Then we assemble the page by including the required templates and inserting the content.
While using web site templates a person needs to be careful about certain things. It would not be a good idea to opt for the wrong theme design. This will give one‘s site a dated look which is definitely not desirable. One should also ensure that a template is in sync with the theme and content of a site. For instance, a children site should not use a corporate theme based template. This looks quite unprofessional and mars the appeal of the site.