I have noticed that many people don’t use Facebook and that is a big loss. Facebook is the largest social network of the world. Facebook has many advantages. Hundred millions of people use it every day. We get messages, notifications from our friends or the popular people we just liked or from the group we had joined before. The information can move faster between you and the world. You can contact people from different parts of glob with just one touch and share endless information. In addition, we can keep in contact with our relatives or friends who live far away, we can know what happens in our surroundings, and we can chat with our friends. What are more we can make secret groups where we can invite who we want, and then we can chat privately and the groups has own message wall. We are able to post everything from everywhere. We can post to our friends message wall and anybody can see it. The largest advantage of this social network is that millions of people are registered from all over the world so you can find all of your friends, and the other one is that you can get feedback by "like" and "dislike" buttons. Moreover, Facebook is very easy and more applicable and it doesn’t need a very high level of technology knowledge. You can have an account with a user name and a password from your invention. It provides a high level of personal information security for its users. It saves time and energy in the sense that it opens the scope for you to get the information that you need by asking people. All in all, if you use smart the Facebook and other Social Networks it is really useful.