This document summarizes a presentation about helping brands succeed on social media. It discusses critical mass and engaging fans to fuel growth. It then details how Expedia used an integrated paid and earned media approach including Facebook ads and a sweepstakes app to rapidly grow its Facebook fan base from 750,000 to over 1 million in 5 weeks while lowering the cost to acquire new fans by over 400%. The presentation emphasizes that targeted advertising can drive engagement which lowers costs through effective social feedback loops.