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Cookies: Web Sites
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Cookies allow you to customize your Real experience so when you return to Real web sites your settings are maintained. For example, you can store your favorite radio stations in Real Radio so when you return your stations are only one-click away.
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Cookies can be used for allowing users to express preferences about a Web site. For example, the Google search engine allows the user to choose how many results are to be shown for every query, and this choice is maintained across sessions.
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Developers use cookies constantly, and many developers may not even know that the tools they use are producing cookies. Cookie management is a serious task, with serious implications for web site architecture. Although HTTP has developed significantly over the last few years, it remains a stateless protocol with few signs of a transition toward a more thoroughly connected means of communication. Cookies fill in the gaps between HTTP transactions and turn short quotes into conversations.
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Many websites ... use cookies for personalization based on users' preferences. Sites that require authentication often use this feature, although it is also present on sites not requiring authentication. Personalization includes presentation and functionality. For example, the Wikipedia Web site allows authenticated users to choose the webpage skin they like best; the Google search engine allows users (even non-registered ones) to decide how many search results per page they want to see.
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These cookies usually store a session ID that is not personally identifiable to users, allowing the user to move from page to page without having to log-in repeatedly. They are widely used by commercial web sites (for example, to keep track of items that a consumer has added to a shopping cart).
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Third-party cookies are created by a Web site other than the one you are currently visiting; for example, by a third-party advertiser on that site. The purpose of such cookies is usually to track your surfing habits, which is why third-party cookies are considered an invasion of privacy and riskier than first-party cookies.
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