Microblogging services are a social media platform in which users post their current states as a short text, similar to instant messaging (IM). Recently, microblogging services, including Twitter, have become extremely popular. Concomitantly with the growth of Twitter, several companies have begun to use Twitter as business tools. Some companies have succeeded in increasing sales. However, most companies are troubled at how to use Twitter and how to win popularity in the Twitter milieu. As described herein, we analyze how the number of followers changes in a certain period and determine which parameters dominate popularity in the Twitter world. We also classify Twitter users into groups based on social tagging and propose methods to become popular when using microblogging services.