The majority of tweets come from a small group of “extremely active” Twitter users, a study from the Pew Research Center found.

About 80 percent of all tweets from U.S. Twitter users come from just 10 percent of users. These users tweet 138 times per month, while the median Twitter user only tweets twice per month.

Unlike the app Tiktok on which you can find videos on multiple topics and which is paying vastly, about which you can read more here, these superusers of twitter are more likely to be women and more likely to tweet about politics, the study found. In most other ways, this group falls mostly in line with the average Twitter user, which the study found to be younger, more educated, more likely to identify as a Democrat and likely to earn more than the average U.S. citizen.

Twitter users also differ from the rest of the U.S. on some hot-button social issues.