HTML since 1990s continue to develop their work and to grow on a better direction. From HTML4 to HTML5 was a big step and a big HTML code evolution.
In order to start a new web project on developing better to have a basic structure of html. A good solutionis to find a basic one on google or better one is to create our personal template, with requirement class and id. No metter if work on different cms platform or just on html.