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Today we're talking about the robots META tag that tells a web robot whether a Web page can be indexed and can track links on its pages. The tag element already occupies an increasingly important position. Also, it applies to not having control over the robots.txt files in the top-level server directory, and some search engines are now fully compliant with the robots Meta Tag, such as Inktomi. The format of the Robots meta tag: The robots meta tag is placed in the header area (head area) of the background HTML source code.
Let me cite an example:
<HTML>
<HEAD>
<meta name= "ROBOTS" content= "Noindex,nofollow" >
<meta name= "DESCRIPTION" content= "this PAGE ..." >
<TITLE>...</TITLE>
</HEAD>
<BODY>
...
Robot Meta Tag options:
There are four instructions available in a single Meta Tag: INDEX, NOINDEX, follow, and NOFOLLOW, separated by ",". which：
Index directive: Indicates that robot can index this page;
Follow directive: means robot can follow link of this page;
NOINDEX directive: Deny Robot Index this page, but can track the link on the page;
NOFOLLOW directive: Reject robot Tracking link on this page, but can index this page.
Instance：
<meta name= "ROBOTS" content= "Index,follow" >
<meta name= "ROBOTS" content= "Noindex,follow" >
<meta name= "ROBOTS" content= "Index,nofollow" >
<meta name= "ROBOTS" content= "Noindex,nofollow" >
In some of the search engine articles on the robots Meta tag, the predefined default settings are index and follow. But not for Inktomi. The default entries for Inktomi are index and nofollow.
There are also two global directives: all and none.
All=index,follow: Indicates that this page can be indexed and can be tracked by the link;
None=noindex,nofollow: Indicates that this page is not allowed and is not allowed to be tracked.
At present, the Chinese web site in the optimization of the use of robots META tag is still relatively small, but in the English site has played a more and more important role, due to the recent domestic famous Chinese search engine has been too much adjustment algorithm, similar to the robots meta Tag such an international label will be more and more widely regarded. (This article is provided by http://www.daqing.sh)
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