Before we can begin with creating a template, we have to define what exactly is a template.
A template is a set of common elements of the website. And you may then ask, what is a website? A website is a set of logically connected web pages, concerning one particular subject. When we talk about a company website, the subject will be the company. In case of a private website, the subject will be the person who the website is about, and so on.
You could, of course, design all the subpages individually with a different design for each of them. While this is possible, such a solution would have several serious disadvantages. They are listed as follows:
If the pages don't have a consistent design and layout, visitors may get the impression that they have been redirected to another website and may feel lost
If each page has a different, individual menu, located in different places, navigating between the pages would be difficult, and the visitor would have to focus on how to navigate instead...