Search+engine+optimization

Since always, make search engine optimization classmates will nofollow is regarded as a reliable factor. Because he can ensure the correct recognition and prevent reptile of spam, and there are many links to limit, but in recent Mattcutts SMX congress said above, the effect has been reduced nofollow. SEO The results, and many SEO nofollow abuse, after a page is not caused many effective index, another important point is that, because of, Google nofollow is not valid, Pagerank. Of course, there are more and more tip: for example, Google is to grab some web content and depth, Google to strong push Canonical properties etc.

Actually it is difficult to imagine nofollow reduces the effect after Google, analyses the consequences:

1, paid links and lots of spam, can effective Nofollow is used after the other websites, obtained from the pages of the value is no Pagerank, strictly speaking, is not to be counted, release, although only Nofollow, but because the transfer was Pagerank attenuation, but if the amount from the quality level or from the level, or will be considered. This will cause more paid links and more spam. Such as bolg comments so much, artificial increased the difficulty of the webmaster? For Google itself algorithm is more noise? These are possible.

2, JavaScript before being grab, Google is now, but can grab Nofollow timely, won't cause part after repeated contents. If I let go, then there is repeated contents of phenomenon? Of course, come from the data model, if a website to use or internal structure do enough OK, can distinguish between such content.

Although not quite clear the effect after Google is what kind of situation, but at least he can know after the release of influence after determining how to seo your website. So if that's the case, may in the scope of operation in the page SEO, the code for page will be higher. But more to use the robots.txt file and Canonical attributes. SEO All this is possible. But to say that Google often: do website, there can be no worry.