A piece of web code that I can’t understand_html/css_WEB-ITnose

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meta tag reference: http://www .w3school.com.cn/tags/tag_meta.asp

element can provide meta-information about the page, such as description and keywords for search engines and update frequency.

The tag is located at the head of the document and does not contain any content. The properties of the tag define the name/value pairs associated with the document.

Reference

http://www.w3school.com.cn/tags/tag_meta.asp


Define as html document and encoding

Define document description

Define the author of the document

meta tag reference: http://www.w3school.com.cn/tags/tag_meta .asp
1

Describes relevant information of the web page.
The first item indicates that the web page file is text/html type, and the character set used is gb2312;
The second item is the relevant description of the web page, which can be used as keywords for search engines and SEO;
The third item Description of author information.

The second item is the relevant description of the web page, which can be used as a keyword for search engines and SEO; and http-equiv="Content-Type"

expresses confusion