contact. This prevents web activities from being assigned to a specific person. DoubleClick cookies used a pseudonymous identification number assigned to your browser to review advertisement clicks and [...] that the user clicked on the advertisement and was forwarded to this page. Each Adwords customer is assigned a different cookie. Cookies therefore cannot be traced through the websites of Adwords customers [...] servers of Facebook. For users logged in to, e.g., Facebook, this means that usage data will be assigned to their personal accounts. If you activate the buttons, i.e., the plugins of Facebook by, e.g.