input: [Cookie name] DoubleClickID [Description] 
output: This is an anonymous, unique identifier used to track how successful our advertising is. The Google DoubleClick cookie also enables Google and its partners to track and serve our advertisements on other websites across the Internet based on your visit history (or behavioural profile) to our website. Recent click history for your device is also collected in encrypted form, this allows external advertisers to target users of the device with adverts based on perceived interests. The cookie doesn’t store the IP address, but this is passed through to Google along with cookie by the browser. Google then renders the IP address unreadable by removing the last 3 characters. No personally identifiable data is collected or stored. This is a third-party cookie. You can control the ads that you see on Google and find out more about how the ads are selected for you by visiting www.google.com/settings/ads. Alternatively, you can also manage and opt-out of Google DoubleClick and other third party cookies by visiting www.youronlinechoices.com/uk/your-ad-choices.