Of course, there is Twitter, its whimsical director Elon Musk, its moderation rules which change all the time and concerns for the future of this social network. But these are adult concerns. Because what interests Swiss teenagers above all is what is happening on TikTok. In the space of a few months, the Chinese social network has made a dazzling breakthrough in Switzerland, as the study James published this Thursday by the Zurich University of Applied Sciences (ZHAW) and Swisscom.