It's been five years since Google announced its malware and phishing protection via their Safe Browsing effort. Its goal was to protect people from malicious content on the Internet. This protection extends not only to Google’s search results and ads, but also to popular web browsers such as Chrome, Firefox and Safari.

Here are a few of its efforts:
• We protect 600 million users through built-in protection for Chrome, Firefox, and Safari, where we show several million warnings every day to Internet users. You may have seen our telltale red warnings pop up — when you do, please don’t go to sites we've flagged for malware or phishing. Our free and public Safe Browsing API allows other organizations to keep their users safe by using the data we’ve compiled.
• We find about 9,500 new malicious websites every day. These are either innocent websites that have been compromised by malware authors, or others that are built specifically for malware distribution or phishing. While we flag many sites daily, we strive for high quality and have had only a handful of false positives.
• Approximately 12-14 million Google Search queries per day show our warning to caution users from going to sites that are currently compromised. Once a site has been cleaned up, the warning is lifted.
• We provide malware warnings for about 300 thousand downloads per day through our download protection service for Chrome.
• We send thousands of notifications daily to webmasters. Signing up with Webmaster Tools helps us communicate directly with webmasters when we find something on their site, and our ongoing partnership with StopBadware.org helps webmasters who can't sign up or need additional help.
• We also send thousands of notifications daily to Internet Service Providers (ISPs) & CERTs to help them keep their networks clean. Network administrators can sign up to receive frequent alerts.