Cookie (also called web cookie, Internet cookie, browser cookie, or simply cookie) is a small piece of data sent from a website and stored on the user's computer by the user's web browser while the user is browsing. Each time you visit a page on this website, the website will try to check if you had visited it earlier or it is first time you are visiting the website. The website need to find that you have visited before, by using cookie. It's important to note that cookies are site specific. A cookie set by one website cannot generally be accessed by another website.