https://techcrunch.com/2018/03/13/google-removed-3-2b-bad-ads-in-2017-blocked-320k-publishers-90k-sites-700k-mobile-apps
origin - https://www.pipiscrew.com/2018/03/in-2017-google-removed-3-2b-bad-ads-and-blocked-320k-publishers-90k-sites-700k-mobile-apps/ in-2017-google-removed-3-2b-bad-ads-and-blocked-320k-publishers-90k-sites-700k-mobile-apps