For the first time in its recent history, the favorite social network of teenagers, Tik Tok publishes its annual report. Over 200 titles have been viewed over a billion times this year. The network becomes essential in the music industry and disrupts the marketing strategies of record companies. To talk about it, the journalist for the lesjours.fr site Sophian Fanen, author of "Boulevard du stream", an essay published by Le Castor Astral.