https://arstechnica.com/information-technology/2017/04/microsoft-opens-up-on-windows-telemetry-tells-us-most-of-what-data-it-collects/ https://arstechnica.com/i

https://arstechnica.com/information-technology/2017/04/microsoft-opens-up-on-windows-telemetry-tells-us-most-of-what-data-it-collects/ https://arstechnica.com/information-technology/2017/04/micro... This suggests it is used for advertisements.