Rich Harris, Michael H. Keller and Jennifer Valentino-DeVries report:
The business of location data has grown dramatically in recent years, a New York Times investigation found. Apps on smartphones send precise location data sometimes thousands of times a day. Companies prize the information, which can help advertisers target consumers and investments funds understand trends.
Though the raw data is anonymous, it can often be linked to people’s identities by comparing movements to publicly available information like home addresses.
READ THE FULL INVESTIGATION:
Your Apps Know Where You Were Last Night, and They’re Not Keeping It Secret