And to top it off, this approach makes replacing the existing site-wide appearance with a new one a real pain because every single page in the site must be edited in order to use the new look and feel.
Such copying and pasting operations are ripe for error as you may accidentally copy only a subset of the shared markup into a new page. For starters, every time a new page is created, you must remember to copy and paste the shared content into the page. A naive approach is to simply copy and paste the common layout markup into all web pages, but this approach has a number of downsides. There are a variety of techniques for creating web pages with a consistent look and feel. For example, while each tutorial or forum post on have their own unique content, each of these pages also render a series of common elements that display the top-level section links: Home, Get Started, Learn, and so on.
