In other cases, websites monitor which of its sites the visitor accesses. In the second instance, the information collected is not personal in nature and therefore is most often anonymous. In other instances, personal information is required in order to complete a transaction. Consequently, privacy policies that agencies write for their sites will also be diverse. In the context of the web, a cookie is a short piece of data, not executable code, which is sent from a web server to a web browser when that browser visits the server's site.
State allows the two machines to share interrelated information over a series of exchanges.
Cookies that last for longer than one visit are called persistent cookies and can last indefinitely. Persistent cookies have been used in the private sector to track the trail of links that a particular visitor follows. A server cannot find out your name or e-mail address, or anything about your computer using cookies. Opt-in means that the visitor must choose to allow information to be used in a specified manner. Opt-out means that the visitor must choose to disallow a particular use of information.