a website or computer program that allows people to communicate and share information on the internet using a computer or mobile phone

We teach children how to deal with cyberbullying and the safe use of chat rooms and social networks. 我们教孩子们如何应付网络欺凌，以及如何安全使用聊天室和社交网络。

the different groups of people that you know

Students graduating from high school have social networks they've been building for twelve years. 高中毕业生们已经有了一个营造了12年的社交网络。