Data Collective Accounts

User accounts that collect and store data about a single user.

Google
Google has user accounts that allow a user to streamline accounts through all of its services, including Gmail, YouTube, Google+, Google Maps, and many others. Accounts with Google mine data of almost every aspect of a user's browsing habits, as well as data about their location and other aspects of their lives.

Facebook
Facebook accounts are personalized by each user, and generally contain a great deal of personal information including friends, family, work, and interests.

Utility
Search Engines like Google and Bing state that they store this information to personalize the web browser. Creating a custom experience for each user. Searches within the engine are more accustomed to previous searches on the users account. It is true that this can be helpful in creating a search engine which is personalized for the normal patterns of a User. However, the data generated by these accounts are generally used for advertising purposes, allowing advertisements to be tailored to specific individuals. Using Artificial Intelligence, a website like Google or Facebook can create custom advertisements based on your interests.