Cookies are small text files that a site saves on your computer or mobile device when you visit this site. In this way, the site remembers your actions and preferences (such as login, language, font size and other display preferences) for a while, so you do not have to enter these preferences each time you visit the site or browse its pages.
You can control and / or delete cookies according to your wishes. More details at: aboutcookies.org. You can delete all cookies already on your computer, and set up most browsers in a way that prevents cookies from being installed. However, in this case, you may need to customize certain preferences yourself whenever you visit a site, and some services may also not work.