Google first began as the helpful search engine which endeavored to index the entire web. As the company grew, it moved into other online content areas, including the popular webmail offering, Gmail, the online office suite Google Documents, as well as personal cloud storage courtesy of Google Drive, navigation with Google Maps, and Android OS.
With so many avenues for data collection, Google rapidly acquired a good deal of information on each user. This begs the question: what is the company doing with all this data?
Full article: What does Google know about you? | TechRadar