The Cost per Click page allows you to update your estimated average CPC. The CPC is used to estimate cost savings and cost of ad fraud. The CPC used is the default CPC unless there are ad accounts.
You can add a new network override by simply clicking “Add a new Cost Per Click”.
Select an ad network, and add a new Cost per click to override the default.
For Google, you can toggle on the “Use the Network Cost Per Click Value” option to use the 30-day average CPC for the network if available.