What is the charging model for ads in the Product Ads bidding system?
- Each winner pays exactly the same as they were originally willing to pay.
- Each winner pays the minimum necessary to beat its closest competitor. That is, it will pay a lower actual CPC. This is known as the second best price mode.
- Each winner pays the maximum CPC he was willing to pay according to his or her target ACOS. That is, he or she will pay an actually higher CPC.