It refers to usersinformation stored in a website so that they are remembered when a request is made in the future

Cookies are sent to a users hard drive from a web server via a web browser. The information passed in the form of cookies contains essential features that are used widely on the web including personalized portals and shopping carts. The role of cookies has been under scanner from many critics who believe they can pose serious threat to the privacy of users while using online advertisements. Few of them believe the information thus stored can be utilized by larger companies and used against individuals. As a results, cookies are not used everywhere. A section of web population use internet services while having disabling cookies.