Cookies give the server information about a user's identity, preferences or past behavior.
Cookies sometimes are created from forms that users are asked to fill out when they get to a Web site that supports them. Not every browser can support cookies. Cookies are small data files, typically less than 4K bytes. They are generated by World Wide Web sites to track the number of visitors and to which areas of the site those visitors go. Cookies are accepted by a user's browser for storage on the client's hard drive.