The customers you already have could be your biggest lead source, and you may not even realize it.
Google advertisers are familiar with what is known as the “Quality Score” and there is good reason for this.
Your quality score will directly effect the amount you are required to pay for each click to your site. The higher your quality score is, the lower your cost per click will be.
Furthermore, if you focus on obtaining a high quality score, not only will your campaigns be more affordable BUT you will receive the same exposure as you were when you were paying more per click!