Linkedin is best platform to built your professional network and make it vast. I have been using it for past 3yrs. and because of the professional connection I made, I’m get job as freelancer. Many of my friends also got job by the reference of person, they are connected with. If you use Linkedin premium, then it will provide more features and make the chances of getting you job to.
I think students and all working people should help Linkedin account. It will help student to learn from professional person about the corporate world and also help them to secure job.