HTML 5 introduces several new tags which focus of defining the content of a page in a machine readable fashion.
In today’s websites, if a computer program attempts to pick out a particular part of a page, such as the main article, the sidebar or the top navigation, it would have difficulty. This is because every website structures its HTML differently, and most modern websites use <p>, <div> and <span> tags to surround their content. These tags generally define style. The new HTML 5 tags define content.
Defining content makes websites easier to parse by computer programs. This could benefit accessibility readers for the blind and allow content aggregating systems and ‘mash-up’ websites to easily parse, link to and cite your articles.
Here is a list of some of the HTML 5 tags that define content.
More information about HTML 5 tags is available from W3Schools. See the HTML 5 Tag Reference for more details on these tags and the other new tags in HTML 5.