Ahead of iOS 13, which will warn users of apps that collect location data in the background, Facebook publishes a blog post explaining how it uses location data (Kif Leswing/CNBC)

Kif Leswing / CNBC:
Ahead of iOS 13, which will warn users of apps that collect location data in the background, Facebook publishes a blog post explaining how it uses location data  —  KEY POINTS  — Facebook has published an informational blog post about how its app collects and uses background location data from smartphones.