The first and foremost thing which Google claims is browsing SPEED. Google Public DNS implements prefetching: before the TTL on a record expires and thereby increase DNS response.
More Security by preventing DNS spoofing attacks.
Get the Valid Website content.
- No Content Blocking
- No Redirection of invalid pages(as in case of OpenDNS)
- No Filtering
What is the Advantage ‘FOR’ Google in this free business.