Salesforce Trailhead is the best place to acquire the knowledge needed to pass the certification exams. Trailhead makes learning fun by breaking it into small chunks and providing points and badges as you complete the modules, Trails and Projects. The following Trails and Projects are the ones that I have identified as providing the information needed to pass the certification exam as of June 2016: https://trailhead.salesforce.com/trails Expand Your Reach with Communities -En