On Facebook, participants not only share text and pictures, but games, quizzes and other interactive applications they can exchange with their friends. Many of these are created by users themselves, but brand-based applications - if well-designed - can achieve traction as well.
Most applications prompt users to direct results/scores to their Facebook friends Think frivolous, fun and light-hearted - this is not the SAT If your customer is a business, think about creating a helpful productivity tool