I work for a publishers https://www.gvia.mx/blog/medi-care-pharmacy-0c04.pdf#agitated medi-care pharmacy
  Its advice to parents includes asking them to familiarise themselves with websites used by their children, to talk to children about their social networking life, in the same way they do about their normal social activities and to remind them to be careful about how much information they post online, and control who can see it using privacy tools.