Give an example to be familiar with the meaning of the head information of a web page
<!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN
http://www.w3.org/TR/html4/loose.dtd><!--Document Type-->
<html>
<head>
<meta http-equiv=Content-Type content=text/html; charset=gb2312><!--Set the file encoding of the web page-->
<meta http-equiv=expires content=2008/10/15 18:00:00><!--Expiration time for offline browsing-->
<meta http-equiv=pragma content=no-cache><!--Prevent web pages from reading from cache-->
<meta http-equiv=Refresh content=5;https://www.VeVb.com><!--Web page redirection-->
<meta http-equiv=set-cookie content=2007/10/18 18:00:00><!--Set the cookie expiration time of the web page-->
<meta http-equiv=Window-target content=_top><!--Set the target window for links in the webpage-->
<meta http-equiv=Page-Enter content=revealTrans(duration=1000000,transition=50000000)><!--Set the opening effect of the web page-->
<meta http-equiv=Page-Exit content=revealTrans(duration=1000000,transition=50000000)><!--Set the closing effect of the web page-->
<meta name=keywords content=web,jb51,webdesign><!--Set keywords for web pages, priority is given when searching! ! ! important! ! ! The data is indexed by search engines->
<meta name=description content=hahahahahaha><!--Insert description search and is indexed by search engines-->
<title>Title must not be missing! Very useful for SEO! </title>
</head>
<body>
aaa
</body>
</html>