Why does my website report "The site ahead contains malware" in Google Chrome?

Question

Why does my website report "The site ahead contains malware" in Google Chrome?

Answer

The "The site ahead contains malware" message from Google browsers comes from Safe Browsing reports that they receive and review. The error message means that Google detected malware on your site and to protect Google Chrome users, it does not let users access your website.

Google has further details on addressing the problem here:

Request A Review

There are various steps that Google requires that the Administrator review before requesting that their domains be delisted from Google's Safe Browsing database.