There is a problem with the meta tag in html_html/css_WEB-ITnose

I am self-studying HTML, and there are many unresolved problems in it. I would also like to ask my seniors for their advice.
1. Is the catalog text on the right side of the web page written with meta tags?
2. What does http-equiv mean? Please give an example.
3. What is href? Please give an example.
4. How to use meta tags to set keywords.

Reply to discussion (solution)

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

href specifies the address of the hyperlink

keywords
meta name="keywords" content="HTML,ASP,PHP,SQL"

There are many tutorials, you can browse them have a look.
Welcome back

The attributes of the tag define the name/value pairs associated with the document.

href specifies the address of the hyperlink


http://baike.baidu.com/view/953191.htm