Sometimes I find myself somewhat amazed by the ability of a small community to sensationalize change, even when the change is relatively minor. The recent announcement by Google that it has changed it’s algorithm so that link bombs will no longer work seems to have generated a higher level of discussion than really necessary.
For those who don’t know what a link bomb is, basically it means using off-site links to make a site rank higher for a keyword that the site itself is not targeting. For example, typing “miserable failure” into Google used to bring up President Bush’s official page on the Whitehouse website. Searching for “liar” brought up Tony Blair’s website. This was achieved by many sites all linking to the target site (the Whitehouse page) using the same anchor text (”miserable failure”).
On Jan. 25th/07, Google made what appeared to be a small, quick announcement that they had made changes to the algorithm so link bombs would no longer be as effective. On checking former link bombs, for the most part, this change seems to have been quite effective - the target sites are no longer appearing in the top position for the link bomb terms.
NLC looked at the change, figured out what Google was probably doing, made a note, commented in Search Engine Land about the limitations, and moved on. That’s life in Search Marketing.
However, the amount of buzz generated by this (seemingly relatively minor) change has been quite surprising.
There seems to have been quite a lot of speculation about how Google is doing this. In this thread at DigitalPoint forums, some theories presented are that anchor text in general will now be less of a ranking factor, similar inbound anchor text to a site may be discounted, or Google may be hand picking which sites should rank for what. This article surmises that sites which link to Google search results pages might now get a ranking boost.
On the other hand, Graywolf points out that some less controversial “link bombs” (such as Adobe ranking for Click Here) are still working.
Well, no-one outside of Google knows exactly how search results are generated. However, as Search Engine Roundtable points out, the answer could be clearly available in a patent filed by Google last year.
In this patent, Google states that:
“Importing the related bit vector from a target document URL1 into the phrase A related phrase bit vector for document URL0 eliminates the reliance of the search system on just the relationship of phrase A in URL0 pointing to URL1 as an indicator of significance or URL1 to the anchor text phrase.”
Put into plain English, this basically means that link bombs can be easily defused by comparing the anchor text on the linking page to the topic of the page. If the topic of the page has nothing to do with the anchor text, the target page may no longer rank highly for the linking term.
This means that there is a good chance that anchor text may be depreciated as a ranking factor when it does not match the subject of the target page. Looking at the Adobe example, it is possible that this depreciation is not enough to counter the sheer force of an overwhelming amount of links, especially from trusted sites.
What does this mean for legitimate SEO? Simple - make sure that your anchor text matches the subject of your page. This is standard “best practice” for linking, anyway, so nothing much should change for most sites. Everyone take a deep breath now, and relax - this industry has seen far bigger changes than this minor tweak, and there are more are on the way. We’ll be sure to mention when something really serious happens. ![]()
