When you set up advertising systems, an identical CPC is assigned to all products. But what if you need to set a different CPC for different advertising groups, or to choose specific advertising systems for CPC? You can do that in the CPC Rules settings which can be found under a product campaign tab on the right.
First set a CPC value (1.), and name the rule (2.). Then, select the advertising systems to which the rule should apply (all advertising systems are selected in the picture).
Conditions allow you to choose which products will be subjected to the CPC rule (3.). Next to the condition, you can see the number of products regulated by the rule.
You can also set how long the rule is supposed to be applicable to that particular product group (4.).