A Web site visitor's input of personal or business information into a form provided on the Web site. Registration allows the Web site owner to better understand viewers and customers, increases the likelihood of users returning to the site, and usually gains permission to send marketing messages to the visitor. (See opt-in and permission based marketing.) In return, the Web site owner may provide the registrant with access to restricted information (e.g. a research report), a Web site customized for the user, a free service (e.g. free E-mail), a discount on products or services, entry in a sweepstakes, or some other inducement to register. Users generally expect, and Web sites generally provide, a privacy statement describing how the information will be used.