I recently found Google Alerts very useful as a quick way to detect whether any of our web sites are hosting spam. (For those who do not know, Google Alerts gives you updates of the latest relevant Google results based on your choice of query or topic. They can be in the form of email, or news feed).
What I did was, I defined several search terms such as the followings in Google Alerts.
- viagra site:yourdomain.com
- mortgage site:yourdomain.com
I chosed comprehensive search type, delivered to my email address, and once a day in the alert settings.
When Google found new entries, it would email me the summary once a day. I can then glanced through the summary to verify if any of those entries could possibly be legitimate. Or else, I would send that to the appropriate party to follow-up.