COOKIES, what are they?
Cookie is a short text file sent by a website into a browser. It allows the web to record information about your visit, for example your preffered language and other settings. Next visit of the site can be easier and more productive. Cookies are important for easy browsing on the internet.
Cookie files serve an array of purposes. We are using them for example to save your settings of safe search, choosing relevant advertisement, tracking the number of visitors on our web, making registration to new services easier, protecting your data or setting advertisement preferences.
Read about cookie filetypes Google uses, and about how Google and their partners use their cookies in advertisement. Privacy policies descript, how are cookies protecting your personal informations and other data.
(article taken over from www.google.cz)