As parents, it is always worrying when your child knows more than you do about accessing materials online. It can, at times, mean that they can see age inappropriate materials including films, TV, games and social media posts. Parentzone's useful guide to age ratings is here Parentzone Age Ratings.
More information to support you in nagivating conversations with your child can be found here:
Children and technology: Age-appropriate usage advice from the NSPCC
Online Safety Toolkit from Parentkind
Advice for Parents - what to do if your child sees something upsetting online from Childnet