Facebook and Twitter are websites that have made the owners billionaires. You set up your account on them and people post pictures and make friends, chat with each other, etc. from what I understand. A big negative is that they are one way that pedophiles and others with deviant lifestyles search for victims and the cops bust a lot of them that are preying on young kids. Don't let your daughters go on them if/when they start asking. The claim is also that you can get viruses by visiting them with so many wackos out there that are on them and looking to screw people over. I'm like Flags and have never gone on either one and never will.