The big role of seo:html document small meta

Seo Meta is a response header message that is used to simulate an HTTP protocol in an HTML document. Meta tags are useful for Name property
The <meta name= "generator" contect= "> describes the build tools such as Microsoft FrontPage 4.0), etc.;

<meta name= "KEYWords" contect= "" > to the search engine to explain the keywords of your web page;

<meta name= "DEscription" contect= "> tells the search engine the main content of your site;

<meta name= "Author" contect= "Your Name" > tell the search engine to make the author of your site;

<meta name= "Robots" contect= "All|none|index|noindex|follow|nofollow" >
The properties are described below:
Set to all: The file will be retrieved and the link on the page can be queried;

Set to None: The file will not be retrieved and the link on the page cannot be queried;

Set to index: file will be retrieved;

Set to follow: the link on the page can be queried;

Set to NOINDEX: The file will not be retrieved, but the link on the page can be queried;

Set to Nofollow: The file will not be retrieved and the link on the page can be queried.
Http-equiv Property
<meta http-equiv= "Content-type" contect= "text/html"; charset=gb_2312-80 "> and <meta http-equiv=" Content-language "contect=" ZH-CN "> is used to explain the text and language that the home page is made of, as well as the iso-8859-1 character set, as well as BIG5, Utf-8, Shift-jis, Euc, Koi8-2 and other character sets;

<meta http-equiv= "Refresh" contect= "N;url=http://yourlink" > Time to let the page in the specified times N, jump to the page http;//yourlink;

<meta http-equiv= "Expires" contect= "mon,12 May 2001 00:20:00 GMT" > can be used to set the expiration time of the Web page, and once it expires, it must be called back on the server. It is important to note that the GMT time format must be used;

<meta http-equiv= "Pragma" contect= "No-cache" > is used to set the browser from the local computer cache to access the content of the page, once set off the page can not be removed from the cache;

<meta http-equiv= "Set-cookie" contect= "mon,12 May 2001 00:20:00 GMT" >cookie set, and if the page expires, the saved cookie will be deleted. Attention must also be paid to the use of GMT time format;

<meta http-equiv= "Pics-label" contect= "> Web rating, there is a content setting in Internet Options for IE to prevent browsing of restricted sites , And the limit level of the website is set by the meta attribute;

<meta http-equiv= "windows-target" contect= "_top" > Force page is displayed as a standalone page in the current window to prevent its web page from being invoked as a frame page by others;

<meta http-equiv= "Page-enter" contect= "Revealtrans (duration=10,transtion=50)" > and <meta http-equiv= " Page-exit "contect=" Revealtrans (duration=20,transtion=6) > sets the special effects of entering and leaving the page, which is "format/page Transitions" in FrontPage. However, the added page can not be a frame page.