There's no internet in the universe of Game of Thrones. Or running water or antibiotics. But if someone did set up WiFi hotspots on Westeros and provide smartphones, we'd get to see what major characters would do on the internet.
Jamie Jones and Becky Barnicoat of BuzzFeed illustrate what 13 characters from Game of Thrones would do with internet access. Tyrion would rule Twitter with his witty one-liners, Arya Stark would use Pinterest in horrifying ways, and the Mother of Dragons would overshare on Facebook about being a new mom.