The iPhone application offers the same features as the LinkedIn website, which allows us to update our resume, add companies we've worked with before, add contacts, co-workers, former employees or supervisors, etc.
Besides this social and labor component, the application shows us loads of news related to our labor interest. To keep up to date, all we have to do is consult the app's main page.
LinkedIn is a very interesting application for any worker and especially, for any non-worker. If you're looking for employment, being part of this social network will definitely prove favorable.