Registration In order to use this Web site, a user must first complete the registration form. During registration a user is required to give contact information (such as name and email address). We use this information to contact the user about services on our site for which he has expressed interest. It is optional for the user to provide demographic information (such as income level and gender), and unique identifiers (such as, username and password), but encouraged so we can provide a more personalized experience on our site. 