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[ 7 ]Arthur, Charles. "Google shoves Chrome down search rankings after sponsored blog mixup" (http:/ / http://www. guardian. co. uk/ technology/
2012/ jan/ 04/ google-chrome-browser-search-rankings?newsfeed=true). The Guardian..- http:/ / news. cnet. com/ 8301-30685_3-57351920-264/ two-days-after-google-flub-unruly-raises-$25-million/
Further reading
- David Vise and Mark Malseed (2005-11-15). The Google Story. Delacorte Press. ISBN 0-553-80457-X.
External links
- Matt Cutts: Gadgets, Google, and SEO (http:/ / http://www. mattcutts. com/ blog/ ) – his personal blog
- Matt Cutts (https:/ / twitter. com/ mattcutts) on Twitter
- Matt Cutts (http:/ / http://www. ted. com/ speakers/ matt_cutts. html/ ) at TED Conferences
- 2009 BusinessWeek profile (http:/ / http://www. businessweek. com/ the_thread/ techbeat/ archives/ 2009/ 10/
matt_cutts_goog. html) - Philipp Lenssen (2005). "Matt Cutts, Google's Gadgets Guy" (http:/ / blog. outer-court. com/ archive/
2005-11-17-n52. html). blog.outer-court.com, Personal Blog. Retrieved December 15, 2006.
nofollow
nofollow is a value that can be assigned to the rel attribute of an HTML a element to instruct some search
engines that a hyperlink should not influence the link target's ranking in the search engine's index. It is intended to
reduce the effectiveness of certain types of search engine spam, thereby improving the quality of search engine
results and preventing spamdexing from occurring.Concept and specification
The nofollow value was originally suggested to stop comment spam in blogs. Believing that comment spam
affected the entire blogging community, in early 2005 Google’s Matt Cutts and Blogger’s Jason Shellen proposed the
value to address the problem.[1][2]
The specification for nofollow is copyrighted 2005-2007 by the authors and subject to a royalty free patent
policy, e.g. per the W3C Patent Policy 20040205,[3] and IETF RFC 3667 & RFC 3668. The authors intend to submit
this specification to a standards body with a liberal copyright/licensing policy such as the GMPG, IETF, and/or
W3C.[2]Example
Introduction and support
Google announced in early 2005 that hyperlinks with rel="nofollow"[4] would not influence the link target's
PageRank.[5] In addition, the Yahoo and Bing search engines also respect this attribute value.[6]
On June 15, 2009, Matt Cutts, a well-known software engineer of Google, announced on his blog that GoogleBot
will no longer treat nofollowed links in the same way, in order to prevent webmasters from using nofollow for
PageRank sculpting. As a result of this change the usage of nofollow leads to evaporation of pagerank. In order to
avoid the above, SEOs developed alternative techniques that replace nofollowed tags with obfuscated JavaScript
code and thus permit PageRank sculpting. Additionally several solutions have been suggested that include the usage
of iframes, Flash and JavaScript.