recognize visitors when they open websites that are part of the Google Network. On these pages, advertisements may be displayed that refer to contents that the visitor opened previously on other websites [...] collected automatically when our website is visited (e.g., your IP address and the names of the pages you opened, your browser and operating system, time and date of access, search engines used or names of downloaded [...] are deleted automatically after a predefined time, which can vary depending on the cookie. When you open our web page, cookies that are technically required (session cookies) are saved on the hard drive