Now when you a see a job and click Easy Apply button, the linked shows if any of your connections work there. You can ask for a referral with a click. When you click on a connection profile for referral, a ready made message pops up. You can send the same message to your connection or customize it. This feature is good specially for new job seekers who are not sure, how to ask for a referral.
Also LinkedIn has added a new job search filter that allow you limit Job Search Results to those in your network.