• No one can keep track of every app or website, but that's no excuse to ignore everything. Be familiar with the most popular apps, including Facebook, Instagram, Snapchat and Twitter.
• Use parental controls to block movies, videos and apps by age or rating.
• Understand how privacy settings and photo and location tagging can expose your child to unwanted attention from strangers.
• Talk about what's appropriate to share, including the consequences of bullying, threats and inappropriate photos.
• Establish rules about respecting others' privacy. No embarrassing photos or stories. (This goes both ways, parents.)
• Keep tabs on kids' social media use. Understand the apps they're using, the times they're using them, and with whom they're communicating.
• Educate your teen about scams and how to respond to inappropriate behavior. Talk about when to block, report, unfriend, etc.
• Teach them when to ask for help, for example, if they're sent porn, photos/videos of assaults, or are the victim of threats. If this happens, your teen should not delete the communication but show it to a parent or other trusted adult.