Do the right thing with the right label!

HTML semantics is to make the content of the page structure, easy to browser, search engine analysis;

It is also displayed in a document format without styling CSS and is easy to read.

Search engine crawlers rely on tags to determine the context and weight of each keyword, which is conducive to SEO.

Make it easier to read the source code of the site to the site will be divided into blocks, easy to read maintenance understanding