1. Why do people use social networks?
2. How can you segment Cyworld's users? Which segments should Cyworld target? How can it create value for users in these segments?
3. How is Cyworld different than Facebook and MySpace? How are these social network sites different from other large websites such as Amazon, Yahoo, or YouTube?
4. What should be Cyworld's business model - paid items, mobile networking, or adverting? Should Cyworld explore any other areas of opportunity?