Young weigh up risk of social media
12 September 2013 Last updated at 17:35 BST
Much has been written in recent weeks about the risks of bullying and abuse on social networking sites for young people.
The NSPCC says nearly a fifth of children who used them suffered a negative experience last year.
But how safe do young people themselves feel when they are using the internet?
The BBC's Tim Muffet went to meet some users of social media at the Swan Youth Centre in Berkhamsted.