Social networks are everywhere. Millions of peoples use it, and many social networks exist. Your neighbor probably use social networks, also your best friend, and most of your friends. And if you use it, you should know the most famous : Facebook, probably the most used social networks of the world, Twitter, with his @ concept, Snap-chat, and Instagram.  We ask to to people in the over 1800 millions of Facebook’s users what they are thinking about social networks. If you think you know everything, be very attentive by what you will hear.