Only 20% of Google queries are unique
Last Friday Google almost carelessly mentioned in a blog post that "20% of Google search queries are ones we haven't seen in the past 90 days". This is an interesting statistic and can be interpreted in a number of ways.
Keeping in mind that Google handles billions of search queries every day, this 20% figure seems to indicate that the long tail of search perhaps isn't so long after all. Effectively it means that 8 out of 10 searches are repeated at least once over a 3 month period. Or, in web analytics terms, of all searches by volume only the bottom fifth has 1 hit.
Tagcloudchina event privacy youtube research google earth search news blog adwords ppc indonesia maps realtime google wave yandex microsoft seo tools marketing images london advertising internet yahoo gmail google iphone spain funny searchcowboys sem search engines ses app smx streetview google maps search engine strategies matt cutts