One continual concern with PPCs is that there is really no way to discover the real percentage of CLICK FRAUDs
But one way to help counter-balance your loses - is to place your PHONE # on the Ad itself :cheesy:
of course - Make sure the Ad is clear about what you offer
This will produce callers who contact you without having to click on your AD to find your contact info.
Of course, this only works well for clear-cut products and services - or companies that require consultations to assist potential customers or to get refined info.