Yes, it's a social network. Also: Just a third of high school seniors place a call each day, and more teens report using Pandora than Instagram or Snapchat.
For young people,
Facebook is the newspaper,
and websites are the authors.
"2. Websites are much smaller than social networks. If you're confused why digital publishers obsess over Facebook and social media, make this graph your smartphone wallpaper. Even the most popular site among teens—BuzzFeed—has fewer daily visitors than any network or app in the graph. (Even Beats, which is considered a tiny music service, has more daily users than any website in the survey.) Seventy three percent of teens don't read BuzzFeed, 84 percent don't read Reddit, and 96 percent don't read Mashable or Gawker. For young people, Facebook is the newspaper, and websites are the authors."