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SEO Optimizer meta tag name= "robots" content= "index,follow,noodp,noydir" explanation(2012-10-11 10:33:08) reproduced

SEO optimization meta tag name= "robots" content= "index,follow,noodp,noydir" what does that mean, we'll explain.

<meta name= "ROBOTS" content= "NOODP" >

These meta tags control how search engines crawl and index pages. The rules specified by the "robots" META tag apply to all search engines, and the rules specified by the "Googlebot" META tag apply only to Google. Google can understand the following values (when specifying multiple values, separate them with commas):

• noindex: Prevent pages from being indexed
• nofollow: Do not use the link of the current page to find and crawl new pages
• Nosnippet: Do not display the page summary when the current page is displayed in search results
• NOODP: Do not use text from an open catalog item (aka dmoz.org) when creating a title or page summary for this page
• noarchive: Do not display a "webpage snapshot" link when displaying this page in search results
• unavailable_after:[Date]: Delete This page from the search results after the specified date and time

When you completely omit this tag or when you specify content= "All", the default rule is "index, follow". "As a description, you can now also specify this information in your page header via the" x-robots-tag "http header command. This is especially useful when you want to fine-tune crawling and indexing of non-HTML files such as PDFs, pictures, or other types.
Robots value
None
Search engines will ignore this page, equivalent to Noindex,nofollow.
Noindex
Search engines do not index this page.
Nofollow
The search engine does not continue to search for other pages through the link index of this page.
All
The search engine will index this page with a link to continue through this page, equivalent to Index,follow.
Index
Search Engines index this page.
Follow
The search engine continues to search for other pages through the link index of this page.
NOODP Noydir
Do not use DOMZ, Yahoo! Directory as described in the Web page summary

Using NOODP and Noydir

SEO friends are often dealing with meta tags, such as writing description, keywords and so on, but rarely used to NOODP and Noydir such a label (these two are actually relatively old, but the domestic generally not very practical), here I would like to do the two instructions, Because in many do English SEO place also have to use. (Meta tag details)
Sometimes the site joins the DMOZ or Yahoo catalog, this is a good thing, but many times when you start to join the time did not consider the complete, or later the changes in the site business, and so on, so that the original good may in some cases have a negative impact, Because Google and Yahoo, by default, will first crawl the information in the DMOZ and Yahoo catalogue as the title and description of the search results.
In order for the search engine to crawl the description of the existing page to use the above tag, such as against Google
< meta name= "Googlebot" content= "NOODP"/>
It's for Yahoo.
< meta name= "slurp" content= "Noydir"/>
Of course, there's a deal with MSN.
< meta name= "msnbot" content= "NOODP"/>
If you want to deal with multiple
< meta name= "robots" content= "Noodp,noydir"/>
If you feel that the information on the catalogue does not accurately outline the content of the existing site, try NOODP and Noydir

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NOODP (no Open Directory Project): The descriptive information in Open directory project is not used as summary information in search results.

Noydir (no yahoo! directory): The descriptive information in Yahoo! Directory is not used as its summary information in search results.

If the site is submitted to Yahoo! Directory or dmoz These open categories, these directories will record the site description information. Sometimes search engines are likely to use the information in the Open Directory site, rather than using the existing Web site information, resulting in search engine information and the site's existing information does not match.
NOODP and Noydir are for the search engine not to use the information on these open catalogs, but to use the existing information on the site.

<meta name= "search engine type" content= "Noodp,noydir"/>

<!--This page does not allow Google to use the web site information in the Open Directory for search results-

< meta name= "Googlebot" content= "NOODP"/>

<!--limit all search engines--

< meta name= "robots" content= "Noodp,noydir"/>

Search engine robot (Specific search Robots) list

Search engine Robots (robot)
Google--Googlebot
MSN Search--MSNBot
Yahoo--Yahoo-slurp
Baidu--Baiduspider
Ask/teoma--Teoma
Cuil--Twiceler
Gigablast--Gigabot
Scrub the Web--scrubby
DMOZ Checker--Robozilla
Nutch--Nutch
Alexa/wayback--Ia_archiver
Naver--Naverbot, Yeti
AltaVista--Scooter
AllTheWeb--Fast-webcrawler
Inktomi--slurp Special purpose search engine robot (Specific special Bots) listSearch engine Robots (robot)
Google Image--Googlebot-image
Google Mobile--Googlebot-mobile
Yahoo! MM--Yahoo-mmcrawler
MSN Picsearch--Psbot
Singingfish--Asterias
Yahoo Blogs--yahoo-blogs/v3.9

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