HTML

HTML5 new features, semantics

HTML5 semantics refers to the reasonable and correct use of semantic tags to create page structure. [Right tags for the right things]

header nav main article section aside footer

Even without CSS styles, the overall page will also present a good structural effect
The code structure is clear and easy to read,
It is conducive to development and maintenance. It is convenient for other devices to parse (such as screen readers) and render web pages according to semantics.
It is conducive to search engine optimization (SEO). Search engine crawlers will assign different weights according to different tags.