The concept of SEO co-citation is not new. Not too long ago, inbound links and anchor text were driving indicators for KW term authority. Once Google wised up to the fact that many webmasters were creating or latching onto entire networks of “bogus” blogs, and genre-centric sites, for the explicit purpose of inflating their inbound link counts, it changed its algorithms to place far more emphasis on the quality of a given site’s inbound links.
In fact, link quantity is now important mainly as it pertains to link quality.
Taking it further – In the realm of true co-citation, (as engines like Google are getting smarter) the need for an actual link even becomes less important. In fact, Google has become so smart that co-citation may even help sites rank for terms they are not specifically optimizing for.
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