This is the unique page layout for a site, specifically sites that are built using CMS (content management systems). A website, on average will have 5-10 page templates. For instance, the homepage and the contact page of a site look different and they also contain different elements, which means they are two different types of page templates.
Assessment of a site, its content, links and design and how all this links to other websites. A page rank can be used to gauge a site’s relevance to the product/service/subject and potentially, its popularity.