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On the microblogging site Twitter, users can forward any message they receive to all of their followers. This is called a retweet and is usually done when users find a message particularly interesting and worth sharing with others. Thus, retweets reflect what the Twitter community considers
interesting on a global scale, and can be used as a function of interestingness to generate a model to describe the
content-based characteristics of retweets. In this paper, we analyze a set of high- and
low-level content-based features on several large collections of Twitter messages.
We train a prediction model to forecast for a given tweet its likelihood of being
retweeted based on its contents. From the parameters learned by the model
we deduce what are the influential content features that contribute to the
likelihood of a retweet. As a result we obtain insights into what
makes a message on Twitter worth retweeting and, thus, interesting.