Many companies and other organizations use LinkedIn as a hiring portal. A typical portal includes descriptions and videos about the organization, lists of all open positions (and links to the organization website, where you can apply online), and profiles of employees. Because organizations want to attract the best candidates, they put real effort into presenting the information you will need to decide whether to apply.

Source: Centers for Disease Control and Prevention, 2014: https://www.linkedin.com/company/157336.