Facebook is the most popular social network site of all time. The popularity of Facebook has increased up to 1 billion users only in 6 years. Nowadays Facebook has become very important part of our life. It is very good for our communication, daily entertainment for users and helps us in many ways. Besides that, Facebook can affect us in other ways. Facebook is free and it's one of the best medium for communication. With the help of Facebook we can connect to different people from anywhere in the world, because almost every people familiar with Internet are using Facebook. First, Facebook gives us the opportunity to know more about our friend’s culture, values, custom and tradition. Also, Facebook is the most appropriate tool for finding old friends. When friends go away to any other place, we often don't get the chance to communicate with them for free. But now Facebook gives us the opportunity to communicate with our old friend very easily without any cost. Another thing, we can share our feelings and what's happening around in our daily life through Facebook. We can also get feedback from our friends about their reaction toward our feelings. It is the best medium to share your feelings and thoughts with others. Second, Facebook advertising and fan pages are very helpful for a successful marketing campaign to many business organizations because, we can also use Facebook as social bookmarking site. We can share our article, blogs, photo to thousands of people. As a result, students can use Facebook for group study by creating a group only for studying. There we can share any information about your projects, homework, assignments, exams, date line. However, Facebook can cause very serious and ill problems, such as obsession and dependence, all this can even become an addiction. Using Facebook for your need is actually good for us but when we waste most of our valuable time then it becomes harmful. The biggest effect of Facebook is its…