When you visit some Web sites, the Web server writes a small file, called a "cookie," to your hard drive.
The next time you visit the site, the Web server reads the cookie file it has placed on your hard drive so it can "remember" who you are. The information stored in a cookie file can be used for a number of things:
- to store the user id and password you submitted for the site
- to remember the options you have selected on the site, i.e. which pages to look at first on the site
- to track your movements in the site
- to remember your previous selections when shopping online
- …. [and many more]