Assuming you don't believe they are lying: We built Google Public DNS to make the web faster and to retain as little information about usage as we could, while

Assuming you don't believe they are lying: We built Google Public DNS to make the web faster and to retain as little information about usage as we could, while still being able to detect and fix problems. Google Public DNS does not permanently store personally identifiable information.[1] More details about exactly what is logged at [1]. As for why, speed and security are the main benefits touted [2]. [1] https://developers.google.com/speed/public-dns/privacy https://developers.google.com/speed/public-dns/privacy [2] https://developers.google.com/speed/public-dns/docs/intro https://developers.google.com/speed/public-dns/docs/intro