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You can also use the X-Robots-Tag directive, which adds Robots Exclusion Protocol (REP) meta tag support for non-HTML pages.خریدبک لینک This directive gives you the same control over your videos, spreadsheets, and other indexed file types.

#remove-content
Q: How do I remove content from Google’s search results?
A: You can put a noindex meta tag on a page, a noindex X-Robots-Tag in the header, password-protect that page, or return a 404 or 410 HTTP status code. After we recrawl the page, it will naturally drop out of our index after awhile.

If you need to urgently remove content, you can use our URL removal tool to request removal of URLs or cached pages from Google’s search results.

#subfolder-subdomain
Q: Is it better to use subfolders or subdomains?
A: You should choose whatever is easiest for you to organize and manage. From an indexing and ranking perspective, Google doesn’t have a preference.

#valid-code
Q: Does validating my site’s code (with a tool such as the W3C validator) help my site’s ranking in Google?
A: No, at least not directly. However, to the extent that cleaning up your HTML makes your site render better in a variety of browsers, more accessible to people with disabilities or folks accessing your pages on portable or other devices, and so on, it can improve the popularity of your site… increasing traffic, natural links to your site (which can help with your Google ranking), and so on.

#searchwiki
Q: My site has dropped in the search results and I noticed that others have made negative comments on my links via SearchWiki. Is that hurting my ranking?
A: Comments or notes made on links via SearchWiki do not affect rankings or cause any penalty. Note: The commenting feature of SearchWiki is no longer available.

#frames
Q: I’m using a hosting service for my site that uses frames / “masked redirects” / “masked forwarding.” Will this affect my site’s crawling, indexing or ranking?
A: We recommend always hosting your content directly using your domain name. Using a forwarding service that uses frames will generally make crawling, indexing and ranking of your content using your domain name impossible.

#dns
Q: How do I know my domain name (DNS) is resolving correctly so that Googlebot and users can access my site?
A: If Googlebot fails to reach your site due to your DNS setup, this will be reported in your Webmaster

Tools account in the Crawl Errors section. To confirm that Googlebot is currently able to crawl your site, use the Fetch As Googlebot Webmaster Tools feature. If it is possible to fetch your homepage without problems, you can assume that Googlebot is generally able to access your site properly. Although most warnings / errors mentioned by DNS-testing tools do not affect Googlebot’s ability to access your site, it may still make sense to review them as they may affect your site’s latency as perceived by your users.

#updated-content
Q: I changed some text on my pages, why isn’t it updated in the search results?
A: Crawling and indexing of pages within a website can take some time. While there’s no way to force an update, here are some tips that may help to speed this process up:
If you have removed unique content (such as a name) from the page and need to have it updated as soon as possible, removing the cached page with the URL removal tools may be a possibility.
If you are using a Sitemap file, make sure to update the last modification date.
If your site’s content is indexed with multiple URLs, resolving the duplicate content issue within your site will generally allow crawlers to find updated content quicker.

#non-html
Q: My website uses pages made with PHP, ASP, CGI, JSP, CFM, etc. Will these still get indexed?
A: Yes! Provided these technologies serve pages that are visible in a browser, Googlebot will generally be able to crawl, index and rank them without problems. We have no preference, they’re all equivalent in terms of crawling, indexing and ranking as long as we can crawl them. One way to double-check how a search engine crawler might see your page is to use a text-only browser such as Lynx to view your pages.

#missing-keywords
Q: When I view a cached page from my site, Google does not highlight any of the keywords that I specified. Am I doing something wrong?
A: In general, no, this is fine. There are some situations where we may not be able to highlight all keywords. This is generally not something to worry about. One way to double-check how a search engine crawler might see your page is to use a text-only browser such as Lynx to view your pages.

Spam

#new-domain
Q: I recently purchased a domain that was previously associated with a spammy website. What can I do to make sure that spammy history doesn’t affect my site now?
A: Verify your site in Webmaster Tools, then request reconsideration of your site. In your request, let us know that you’ve recently acquired the domain.