LinkedIn is a professional’s social network which was founded on 14th Dec 2002 and launched on 5th May 2003. LinkedIn was founded by Reid Hoffman with an aim to professionals from different field together. Unlike other social networks where you connect to people whom you know socially, LinkedIn helps you connect with people from your professional environment. You have to fill your profile by giving all your professional details like your education, work place, jobs you have done and some other. On the basis of that LinkedIn provides you suggestions to connect to certain people for free, but for the rest, you have to pay a basic fee or you have to go premium. As of March 2016, LinkedIn has 433 million registered users with over 106 million active users. LinkedIn also provides your profile to companies which are recruiting people and this makes it a very useful tool for a professional.