Richter mentions that most methods for generating recommendations are not relevant to customer intent and that increasing relevance is the key to cross-selling success. One suggestion Richter made was to show complete sets of complementary items...
Google is also suitably vague about this (and, remember, they don't reveal it either: they only reveal the Toolbar PageRank), but, in essence, it is a logarithmic scale (like the Richterscale for measuring earthquakes) with a base of about 16.
Then we learned how its rating on the Richterscale. The nature of news is that it is constantly developing. For example, we first heard about the Haiti earthquake. Eventually, we understood the utter devastation it has caused - and continues to...
Is this worth a 4.0 on the SEO Richterscale? Probably not. Just a rumble really, but oh how nothing shakes up the SEM industry and gets SEOs chatting like a nice bug in Google search results. Bring up the topic of the Supplemental Index and...