Small business websites are being crippled by an increase in cybercrime, but a hit by a hacker could also place them on Google's blacklist.
The search giant searches the web's 60-trillion URL's for malware and phishing scams.
If it considers a site suspicious, it can shut it down, freezing traffic until the problem is resolved.
Experts say this can affect a business's bottom line and also erode customer's trust.
Google says it doesn't “blacklist” sites, and protects about one billion people with its warnings about unsafe websites.