The most important usage of cookies is in e-shopping as they all the shopping baskets not only need authentication but also needs to remember what goods the customer has bought. (Penenberg, 2005) Cookies are also used for Web analysis. The major usage of cookies is the personalization of websites by specific users. Like the colors, fonts and other outlook of a certain web page for example a certain user can change his hotmail live account according to his/her wish in different colors and can personalize it.
Adam L. Penenberg, (2005). Cookie Monsters; The Innocuous Text Files That Surfers Love to Hate, Slate, Downloaded from World Wide Web on 7th September, 2007 http://www.slate.com/id/2129656/