Google announced that it finds an average of 9500 new malicious sites every day.
Some important points from google blog:
Google protect 600 million users through built-in protection for Chrome, Firefox, and Safari.
Find about 9,500 new malicious websites every day.
12-14 million Google Search queries per day show the google security warning.
Google provide malware warnings for about 300 thousand downloads per day.
send thousands of notifications daily to webmasters.
also send thousands of notifications daily to Internet Service Providers.