"The company ingests billions of data points about people’s location from cell phones, GPS devices, WiFi, and even taxis. The company also collects geo-location data from everyone who downloads Citysense, or any future app (although, the company considers the data to be yours, and you can delete it from the database at any time).
Using machine-learning algorithms, it then indexes all of this location data and ranks places in the real world much like a search engine ranks Websites. But instead of looking at Web links, it looks at how much data (i.e., people) are moving between locations. The company makes money by selling this data in the aggregate to professional investors and financial institutions, who are keen to find out things like where people are shopping."
