In addition to checking your site did not result in additional material other than these reasons, the link may be helpful.
Matt Cutts when in reply to a post once said:
this issue is more complex, detailed analysis to the specific situation.
as the previous section, the same URL may appear in different databases, the new version of the URL may appear in the normal main keyword search. But in other keyword search, it may also appear in the supplementary material.
If your site has a lot of supplementary material, it may affect the rankings. However, if the supplementary material has a corresponding new URL + date + cached version, not a large impact on the rankings. If no new version of the supplementary materials, have greater impact.
URL
supplementary materials will be updated
supplementary material in general will continue to exist up to a year or longer.
but there is not the biggest problem with supplementary materials,cheap jimmy choo, the new version if your site has all been re-crawl, it does not matter up.
how to avoid the additional material
supplementary materials are not for the file, not for the website, but against a specific URL + date + page snapshot.
What does that mean?
First, the added material is a particular URL, rather than a page or a file. For example xxx.com and www.xxx.com, is generally the same file, but are two different URL. This URL may be one of the two normal pages, and the other is to add material.
supplementary material is the date for a particular snapshot of crawled pages, that even if the same URL, the Google database, there may exist several versions,moncler jackets for men, one version of the crawl date for the new A content, the URL + the specific date and page snapshot may be in the normal database. And other crawling the content by the date of B (the same URL,christian louboutin, older content),Google bombing has thrown the White House - Search Engine Optimization SEO 1 day, but may be in the supplementary material database.
so as a URL in the Google database, there are different versions, different dates, new content may be in the main database, the content may be added and old material.
recently often the case, you search for a specific sentence, the sentence in the page actually does not exist,Uggs for cheap, but in previous versions have existed. This time, the date that the old version of URL may be returned at the same time marked as supplementary material.
supplementary material on top of
have supplementary materials are not necessarily a bad thing. Your such a situation, in my view, is the lack of a reflection of PR and links. Your home has been in our master database, but you do not have much links. So I think you site is not a problem, but we can only choose a database index part of file, if 有 more people link to your site, I expect you to Wang Ye Hui return to the main database.
will be updated, but was lower than the frequency of re-crawl.
When the Google spider to crawl the URL of the time, if additional material before making it for that reason no longer exists, then, this URL may be re-classified to the main database.
supplementary material will exist long
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Google to add material in-depth observation
Oct 18th, 2006
Search Engine Optimization SEO
Google's supplementary material issue is receiving more attention this year, the SEO issue. What issues previously discussed will result in additional material, some of today's talk more in-depth observation.
supplementary material that is URL + date + page snapshot
