In my view, it is true that teenagers spend a lot of time on social media but I can't agree it is too much. Because a definition "too much" is completely different for everyone. For example, instagraming or facebooking during a half of an hour is much for me, although my wife does it for about 2 hours everyday, and sometimes I wonder if it's enough for her. I see that kind of problem existes in the modern world. Nowadays even adults prefer to rest using their smartphones and plunging into the network. 

        Anyway it should be better to reduce the amount of time spending by young people on social media. To tackle this problem both sociologists and psychologists recommend to go out often with your friends, to replace the Internet by natural meetings and conversations. Also if it's possible the parrents might get their children to any sport-section or buy some equipments like a bike, a tennis rocket ect.

        I believe that a good solution for this task first of all is creating some certain rules in a family such as eliminating smartphones during a meal, inspiration for speaking to each other, listening to your child. Not less important than previous one is to show teenagers the way of alternative rest. It can be some activities, trips, picnicks, playing table games or something else. 

       To sum up, it's enough to find out your own idea how to spend time out of social media. That decision will be the best for the whole family and particulaly for teenagers.