Children and young people feel social media sites are failing to shield them from pornography, self-harm and bullying content, a UK charity has warned.
Four in five youngsters told the NSPCC they felt sites are not doing enough to protect them from inappropriate and harmful imagery and messages.
Facebook and Askfm, a networking site where users ask each other questions, were rated among the riskiest sites.
Peter Wanless, NSPCC chief executive, said the charity's survey clearly showed they do not feel protected from "upsetting, dangerous, and adult content".
"It's vital parents know about their child's online world and regularly talk with their children about how to get help if they need it," he said.
"We all know that the internet develops at breakneck speed and it can feel nearly impossible to keep up with all of the constantly changing sites, games, and apps that young people use."
The research was carried out with mobile provider O2 as part of the charity's Net Aware initiative to inform parents of the risks and issues with sites their children are using.
