One of the primary purposes of cookies is to save time when you return to a specific Web page. For example, if you personalize Web pages or register for products or services, a cookie helps the Web page server to recall your specific information. This may be useful to simplify the process of recording your personal information, such as billing address, shipping address, email address, etc. When you visit the same Web site again, the information you previously provided can be retrieved, so you can easily use the Web site features without having to re-enter your information.
Cookies cannot be used to run programs or deliver viruses to your computer.