Style of web page elements
HTML 5 continues to promote the separation of the semantic content of documents from the style of presentation of elements on web pages. Many of the HTML tags deprecated in this version were non-semantic tags which provided only some specific styling of web page elements.
Separation of main content and navigation
Earlier versions of HTML were not designed with accessibility in mind. Web page designers created some workarounds such as "Skip Navigation" links (similar to "Skip Intro" buttons), which would be placed near the beginning of web pages to allow users "viewing" a site with an HTML screen reader to keep the software from having to vocalize the navigation links on every page.
HTML 5 continues to support XSL style sheets, which allow the navigation and other common elements to be completely removed from the documents with the main content and placed in one or more style sheet documents. The advantages of separating the navigation from the main content include:
2)