> an accurate map of where the users are with respect to where the advertisers are
Not just advertisers - accurate location context information can (on it's own or in combination with other data) de-"anonymise" location data[1]. Any new sources of data that Facebook can correlate with their existing hoard of data increases the precision of their model of everyone's pattern-of-life.
Not just advertisers - accurate location context information can (on it's own or in combination with other data) de-"anonymise" location data[1]. Any new sources of data that Facebook can correlate with their existing hoard of data increases the precision of their model of everyone's pattern-of-life.
[1] https://www.nytimes.com/interactive/2019/12/19/opinion/locat...