As you start working, you get to find new acquaintances and build friendships. These people can help you find a job when you don�t have one, when you want a new job or when you would eventually plan a career change.
For job seekers, connections can be very useful. When submitting your resume for instance to a certain company, think of your friends who may be working there. They could give your resume a better treatment and help you get scheduled for an interview through small talks with the human resource department. Or when you have a friend working in the company you wish to work for, ask him to give you some valuable information about the jobs openings and the company itself.