1. Why would a business want to create a private SNS? What are some of the challenges associated with doing this? 2. List the characteristics that differentiate an SNS from other types of online communities. 3. For what purposes do businesses use blogs? 4. Give an example of how a business might use a mashup application on its website. 5. Why are social bookmarking services superior to the traditional method of saving website links to a list of favorites or bookmarks in a Web browser? 6. Why is it sometimes difficult to differentiate between types of social media? For example, Twitter is often referred to as an SNS, a microblog, and a social bookmarking service.