Earlier quoted context omitted.
If you lower your CPC bid then the Traffic Estimator shows you the rates for lower positions. The ad on the top of the page always gets more click throughs than the ad that is shown 5th on the page. And thats what Traffic Estimator takes into consideration. But you should know that the Traffic Estimator is just that - an estimator. Your real cost per click and ad positioning with Google depends on a lot of other fact…
> Including things like how good your landing page is. That will impact CPA, not CPC.
You can read more on it here: http://support.google.com/adwords/bin/answer.py?hl=en&an...