Topsy is a real-time search engine powered by the Social Web. Unlike traditional web search engines, Topsy indexes and ranks search results based upon the most influential conversations millions of people have every day about each specific term, topic, page or domain queried.
Topsy's Influence measure is the likelihood that, each time you say something, people will pay attention. Influence for Twitter users is computed using all historical retweets: millions of real, public statements indicating who’s listening to whom.
On our website, roughly the top 0.2% most influential of all Twitter users are tagged “Highly Influential”, and “Influential” tags appear for the top 0.5% most influential Twitter users.
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