One of the core principles of social networking systems that is so appealing is the level of personalization they enable. Both off-the-shelf and internally developed social networking systems offer multiple ways to personalize the user experience, from simple automatic updating emails to more extreme, high-tech capabilities. By design, the user experience is a unique and personalized experience. This is especially true for social networking systems that include the use of virtual worlds and avatars (a virtual you). Your virtual you can be created using a seemingly endless palette of shapes, sizes, hairstyles, and clothing. In addition, the virtual world that your avatar inhabits can be customized in any way to suit your virtual desires. Let's dive deeper into examples of personalization on these systems.