Despite the fact that Google does not sell user data, they do possess enough anonymous data to identify many users by name. Google offers a number of services that collect detailed personal information such as a user’s personal email (Gmail), work email (Apps for Business), and physical location (Google Maps). For those who use Google’s social media offering, Google+, a real name is forcefully encouraged. By combining the many types of information held by
Google services, it would be fairly trivial for the company to match real identities to anonymous Web browsing data. Likewise, Facebook requires the use of real names for users, and as noted before, collects data on 31% of pages; therefore, Facebook’s collection of browsing data may also result in personal identification. In contrast, Twitter allows for pseudonyms as well as opting-out of tracking occurring off-site.