Don’t accept people you don’t really know as friends on social media. There are many people online who are not who they say they are — and some of them are very dangerous. Make sure your Facebook profile’s privacy is set on “friends only” and not on “public,” so only your friends can see your profile and what you post.
Remember that once you've uploaded something, you can’t be sure where it will end up and who will see it. Your posts and “likes” say a lot about you. Sharing too much information about what you like or what you’re interested in can be extremely dangerous. The best way to stay safe is to not share private things over the internet.
Don't share too much about yourself on the internet. Never give out your personal information, such as your address, birthday, or full name to people you’ve met online — and never agree to meet with them in person. If someone you know only online asks you for that information or to meet with you in person, tell your parents or guardians immediately.
Protect your accounts and email with passwords, have a different password for each account, and don’t share your accounts or passwords with anyone else except your parents or guardians.
If you receive a message from a friend and it looks odd, or it doesn’t sound like something they would usually say, check with them before you open it. Their account may have been hacked, and someone may be using it to send messages that are infected with viruses or malware.