Cookies are data that websites store on a user's computer, phone, or other device (in the browser). This data contains information used to save settings (site language, site theme (day/night), etc.), track user activity, authentication, and more. Cookies allow for personalizing the site for user convenience. Cookies are also useful for website owners - they can be used to track user activity, manage advertising, and more. In Ukrainian, cookies are also referred to as - кукіс, кукі, куки, печиво and even реп'яшки (they stick and stay with you).