Once upon a time, when the Internet still used a small amount of thin paper sheets, the meta tag was the Internet's street bulletin...
Meta tags do nothing about content in browser windows, they are used in search engine-like classified directory information about pages.
Meta tag meta can be used as many times as you want, including the content attribute content (necessary), name attribute name and http-equiv attribute.
The name attribute can be anything you like, usually using the author author, keyword keywords and description description. Descriptions are often used by search engines (such as Google and Baidu) to describe pages in search results, and it may itself be the most useful application in meta tags.
Replacing the name attribute with the http-equiv attribute will generate an HTTP header, which will send the information that the page has to the server. The content attributes of the content can then be content-type, expires, refresh (refresh, how long will the page automatically refresh), and set-cookie (set cookies).
Sample code [www.CuoXIn.com]