If your site starts associating with unrelated queries that are popular with spammers, such as queries related to pharmaceuticals, payday loans or replica goods, it’s time to start investigating for 3rd party attacks.

A good way to look out for these unexpected queries is to set up Google Alerts (http://goo.gl/eVox96). For example, if you set up an alert for [site:example.com (viagra|cialis|casino|loans)], we’ll notify you when these keywords appear on your site.

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