Google has shared with us some of the stats around sites that are infected and what Google does to protect users from it.
Here are some of the key stats on the search side:
- Google discovers 9,500 new malicious websites every day
- Google displays the hacked or compromised warning on about 12-14 million Google Search queries per day
- Google sends out thousands of notifications daily to webmasters
- Google send thousands of notifications daily to Internet Service Providers
Take a look at some of these charts:
Google's Matt Cutts said on Google+:
Part of my job involves collaborating with the people at Google who detect malware, phishing, or unsafe downloads. They're a fantastic group of folks, and I'm incredibly proud that Google provides a free Safe Browsing API that Chrome, Firefox, and Safari all use.
Forum discussion at Google+.