Squilookal - 10:49 am on Jun 12, 2012 (gmt 0)
The key here is anchor text diversity because with naturally acquired links there is always diversity as they come from different sources and are written by different people. Google won’t penalise for mywebsite.com anchor or non keyword specific anchor text like “here” or “more” no matter how much you have but you would be more likely to fall foul of the algo if you have 90% of your backlinks with a single keyword or phrase like “buy blue widgets” for the simple reason that organically acquired links are never like this.
A very good article I read (with a lot of actual data rather than just opinions of self proclaimed SEO gurus) suggests that having not more than 50% of your anchor text as your target keyword is safe and that the SEO drive should now be less related to simple anchor text and more concentrated on niche and content relevancy. To me this makes sense as it is how natural links get built and it is more difficult to replicate. For those that use SEO tools to look at back link profiles, it is nearly always clear if links have been bought or SEO has been done. What we’re seeing is just Google’s algo finally catching up and doing with millions of metrics and calculations what the human eye can see in a couple of seconds.
Assuming Google is clever enough to ignore “bad” links was once what we all relied on of course but negative SEO is here, what isn’t clear (to me at least) is how Google treats older “bad” links that were placed before the algo updates. My experience is old bad (over optimised) links are largely ignored but new bad links cause a slap. In reality of course, its probably much more complicated than that because it always is.