You can ----------- your data to see how often your ads have appeared on the top of the page, on the side of the page, and on the bottom of the page.
Ways not to set your max CPC bid
How to decide what CPC bid amount to set
A CPP bid must be at least $1.00, which is the minimum per-call fee.
AdWords uses your CPP bid (Cost-per-phone call bidding) and your Quality Score to determine your Ad Rank.