HTML 5 has been the updated standard for HTML syntax since it was formally standardized near the end of 2014. One of the main draws it offers for web designers is support for embedding sophisticated visual media and dynamic aesthetic effects into the fabric of a web page. Impressive parallax scroll effects can therefore be efficiently displayed on users' browsers without the users having to download unwieldy media files. HTML 5 also offers an expanded selection of markup tags that web designers can use to meaningfully divide the contents of their pages into sections for the sake of organizing their pages' code and helping search engines' crawlers index them.
Out of four different segment-defining tags available to web designers, the "article" tag is perhaps the most understandable because it is intended to contain a self-sufficient piece of content that can be consumed by readers without the need for reading other sections to make sense. Each blog post on a website that maintains a blog feature would logically be enclosed within article tags, for example. The "section" tag, on the other hand, exists strictly to be placed throughout a piece of content that is already encompassed within an article tag so that portions of the piece can be designated as partitioned from each other. Logically, each piece of content that is contained within a "section" tag is likely to only make sense when taken together with the other sections in the "set."
The other two tags generally exist to denote aspects of the website's UI or UX that exist alongside the main content of a given URL or page. A sidebar that contains links to URLs that are related to a page's subject matter should be enclosed within an "aside" tag for the sake of orienting the designers working on the website's code. Likewise, the "nav" tag should be used to denote the block of code that provides the navigation interface that is usually located at the top of a given page. Both tags can help Google's crawlers determine how these segments should be assessed in terms of SEO. For more information click here https://css-tricks.com/how-to-section-your-html/.