iPhones include Apple's Safari browser which, at the relevant time was set by default to block third party cookies. Google had deployed what was referred to in the case as the 'Safari Workaround' which enabled Google to set its DoubleClick Ad cookie on a user's iPhone device when that user visited a website containing DoubleClick Ad content. As a consequence, browser generated information relating to those iPhone users (e.g., the date and time of the visit to the website, duration of the visit, which ads were viewed) was received by Google.