Social Media guru Charlene Li thinks that finding search value in 140 character tweets requires an entirely new approach to ranking the value of information, and in a new interview, she talks about why PageRank doesn't work for this kind of real-time information, as well as how the increasing searchability of social media is changing how people use it. "With PageRank, the more links that came into a piece of content the more meaningful and important it was. That works in a static web, and it tends to lean toward things that have better longevity. When things are coming in real-time, how do you determine whether content is important or relevant to a particular search query? How do you understand the social signal and all of the metadata that surrounds it? There's very little metadata associated with a 140-character tweet.""
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