It's a funneling thing - 10000 people see the ad, 100-300 people click through, 2-3 people complete a transaction. A/B testing on ad copy and landing pages can

It's a funneling thing - 10000 people see the ad, 100-300 people click through, 2-3 people complete a transaction. A/B testing on ad copy and landing pages can fine tune the process. Check out AzoogleAds.com, ShoeMoney.com, etc.