More than 15% of Internet users have reported experiencing the takeover of an email or social networking account. Hijackers are constantly searching for, and are able to find, billions of different platforms usernames and passwords on black markets. Phishing posed the greatest threat to users, followed by keyloggers, and third-party breaches. Google applied its insights to our existing protections and secured 67 million Google accounts before they were abused. There are some simple steps you can take that make these simple steps.”]
Source: https://security.googleblog.com/2017/11/new-research-understanding-root-cause.html