I try to add no follow back links to Yzenith as much as i can, But it does not work at all, or they are so weak, I test Chinese food recipes blog website, Authentic Chinese food Recipes free blog, Chinese food recipes easy, Chinese food recipes authentic Chinese cuisine and cooking. Most of them are stay or even dropped a little bid, So my conclusion is that, No follow back links are useless. Like blog review, directory(no follow), Forums.
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 internet advertising because their search algorithm depends heavily on the number of links to a website when determining which websites should be listed in what order in their search results for any given term. However, new information suggests that search engines will depend less on links in the future and more on other aspects such as mentions that don't include links.
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.
The specification for nofollow is copyrighted 2005–07 by the authors and subject to a royalty free patent policy, e.g. per the W3C Patent Policy 20040205, 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.
Google announced in early 2005 that hyperlinks with rel="nofollow" would not influence the link target's PageRank. In addition, the Yahoo and Bing search engines also respect this attribute value.
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 of outgoing normal links as they started counting total links while calculating page rank. The new system divides page rank by total number of out going links irrespective of nofollow or follow links, but passes the page rank only through follow or normal links. Matt Cutts explains that if a page has 5 normal links and 5 nofollow out going links, the page rank will be divided by 10 links and one share is passed by 5 normal links. In order to avoid the above, alternative techniques were developed that replace nofollowed tags with obfuscated JavaScript code and thus permit PageRank sculpting. Additionally several techniques have been suggested that include the usage of iframes, Flash and JavaScript.
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 internet advertising because their search algorithm depends heavily on the number of links to a website when determining which websites should be listed in what order in their search results for any given term. However, new information suggests that search engines will depend less on links in the future and more on other aspects such as mentions that don't include links.
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.
The specification for nofollow is copyrighted 2005–07 by the authors and subject to a royalty free patent policy, e.g. per the W3C Patent Policy 20040205, 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.
Google announced in early 2005 that hyperlinks with rel="nofollow" would not influence the link target's PageRank. In addition, the Yahoo and Bing search engines also respect this attribute value.
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 of outgoing normal links as they started counting total links while calculating page rank. The new system divides page rank by total number of out going links irrespective of nofollow or follow links, but passes the page rank only through follow or normal links. Matt Cutts explains that if a page has 5 normal links and 5 nofollow out going links, the page rank will be divided by 10 links and one share is passed by 5 normal links. In order to avoid the above, alternative techniques were developed that replace nofollowed tags with obfuscated JavaScript code and thus permit PageRank sculpting. Additionally several techniques have been suggested that include the usage of iframes, Flash and JavaScript.