A method for analyzing viral marketing effects of a social network service is disclosed. The method includes collecting response information for a plurality of contents disclosed on a social network service using an API provided in a social network service, calculating a mean value and a standard deviation value obtained by numerically averaging the response information on the plurality of contents, Calculating a rank for each content using the average value and the standard deviation value, and calculating a rank for each content using the average value and the standard deviation value. According to the present invention, viral marketing effects of a social network service can be analyzed by collecting reaction information on contents.
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