What are cookies?
A cookie is a small text file that is stored on a user's web browser. The cookie is set by request by a web server to a web browser (e.g. Internet Explorer, chrome). A cookie is entirely 'passive' and does not contain software programmes, a virus or spyware. A cookie is composed of two parts, its name and its content or value of the cookie. Moreover, the life-time of the cookie is determined. Technically, only the web server that sent the cookie can access it again when a user returns to a website associated with that web server.
What are cookies used for?
A cookie contains information linked from a web browser (the user) to a specific web server (the website). If a web browser accesses that web server again, the web server can read from and react to that information. Cookies ensure a user-friendly experience and support safety efforts for many online offers and services, e.g. language preferences, privacy settings, shopping baskets of online shops or relevant adverts.