Avon and Somerset police are supporting an international initiative to keep children safe online.
It comes as figures show that 38% of young people have been affected by cyber bullying.
Safer Internet Day will be launched tomorrow. It will promote positive ways to use technology, and raise awareness about issues like online bullying and privacy.
The event aims to explore how parents and children can help create a better and safer online community.
Cheltenham Council's holding free internet safety sessions today for parents, teachers and carers.
They'll cover topics like the rise of social media, and how to protect young people from online bullying. The Council says primary schools throughout Cheltenham are concerned that staff and parents need extra support to tackle the internet's potential dangers.
The MP for Devizes is asking parents to keep a closer eye on their children's mobile phone and internet usage. Claire Perry says it'll help protect them from online dangers such as adult images and innapropriate contact with strangers.
She has given the warning in her role as childhood adviser to the government.
Christine Tanner from Kidscape gives parents advise on helping your children stay safe on the internet ..