Here is another way to use LinkedIn

One way to use LinkedIn is to investigate the organizational structure of any firm before you go to interview there. "You can see the résumé of the person in the job that you want or where the person who was in the job that you want has gone," says Willy Franzen, who runs the entry-level jobs blog One Day, One Job. Many job listings don't include a position's full description. By looking at the bios of others who've filled the job, you can get a better idea of what's required from you.