According to a definition on Wikipedia, “An HTTP 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.” Simply speaking we can say that, cookies are like normal files which contain small pieces of data that could be like a username and password which are exchanged between a user’s computer and a web server in order to identify specific users and to improve their browsing experience.