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"usage metrics really matter" he is probably referring to the amount of time, page views, and bounce rate of the site.
Does anyone have any hard evidence of this? I mean real data. Its all the talk, and makes sense, but we have not been able to definitively prove this theory.
It has been discussed at length these metrics are becoming more and more part of the site rankings.
...scenario, i tell my 35.000 forum members to search on google for "keyword xyz" click on my site that is on page 2, and stay there for a minute and then click to another page and stay for a minute and so forth for three more pages and than only leave the site, will that be UBO, User behavior optimisation?
Google has informed me that there was no Panda update since Panda 2.3 and no, it is not a rolling update as of now.
User metrics is in fact a key factor.