I was surprised how many use G+, and it shows that, despite its reputation amongst many, Facebook still holds 71 pct of the market for teens.
If you're marketing to teens, you really ought to read the full report in the link.
24% of teens go online “almost constantly,” facilitated by the widespread availability of smartphones.
Aided by the convenience and constant access provided by mobile devices, especially smartphones, 92% of teens report going online daily — including 24% who say they go online “almost constantly,” according to a new study from Pew Research Center. More than half (56%) of teens — defined in this report as those ages 13 to 17 — go online several times a day, and 12% report once-a-day use. Just 6% of teens report going online weekly, and 2% go online less often.
Much of this frenzy of access is facilitated by mobile devices. Pew Internet Survey: Teens, Social Media and Technology Overview, 2015 [pewinternet.org]
Teens are diversifying their social network site use. A majority of teens — 71% — report using more than one social network site out of the seven platform options they were asked about. Among the 22% of teens who only use one site, 66% use Facebook, 13% use Google+, 13% use Instagram and 3% use Snapchat.